1 + 2 = 3 !

Tonegawa found Ebitani standing sideways in a full length mirror of their now shared room, watching the younger man gaze at his own reflection with his hands plastered on his stomach.
It was no surprise to find him like this, stuck in front of the mirror with the same expression on his face. Confusion. Wonderment. Excitement. It was a bundle of emotions that made Tonegawa crack a smile as he carefully closed the door behind him only to have Ebitani whirl around and stare at him with his sunglasses lowered on his nose.
Even after taking time away from work, Ebitani had a hard time putting his trademark sunglasses away. It looked a little out of place with his hoodie and sleep pants but Tonegawa thought it was cute. No matter what, Ebitani was still a Blacksuit.

“Something wrong, Ebitani?” Tonegawa asked as he took his time walking over to his lover, seeing Ebitani almost turn back instantly to the mirror to rub on his stomach. A new habit he had started. One that Tonegawa couldn't help but want to mimc.

Ebitani kept his mouth in a tight line, looking himself up and down in the mirror before sighing loudly.

“I know it's too soon with only a few months or so in but I'm waiting for the ebi roll to kick.”

Tonegawa stopped himself from laughing at Ebitani's honesty, a key charm point of his, wrapping his arms around his shoulders to pull his lover closer to his chest.

“I see you haven't read the book about the growth of a baby that I bought you.”

When he felt Ebitani freeze up, Tonegawa knew he hit the nail on the head. During the time between work and coming home to find Ebitani shuffling around waiting for him, Tonegawa had bought a stack of books on becoming parents and had hoped Ebitani would have at least cracked open one of the books. Instead, he knew Ebitani was just hopeful that something would surprise him if he looked into the mirror.

“W-Well...”

Ebitani grinned at Tonegawa's reflection in the mirror, unable to even find an excuse for his wishful hoping. Tonegawa could never actually be mad about anything Ebitani did. He was finally going to be a father thanks to Ebitani and the Blacksuits. The time spent with Ebitani had softened him. He didn't feel the need to check his blood pressure as much anymore once Ebitani retired his suit for more fitting clothes for the bump that was forming.
Tonegawa found his arms unwrapping from Ebitani's shoulders to slide down the front of his body to rest on the small bump that would become bigger as the months would pass.

“Don't worry. We'll go through the book together. But right now, we have a guest.”

Ebitani perked up at the mention of a guest, seeming in need of some visitors after being stuck inside lately. The whole pregnancy had him feeling nauseous here and there and it was hard to walk for a long time when it hit.

“A guest? Who would wanna come see me?”

Tonegawa had a feeling this guest was more for him than Ebitani but it would help distract Ebitani from the mirror for at least a few minutes.
Instead of answering the question, the older man led Ebitani to the door of their now shared bedroom. Ebitani was almost bouncing as he walked, excited for any contact.
Maybe it was Gonda! It had been a few weeks since he had stopped by. Maybe it was Saemon, a slightly less exciting guest but still made Ebitani smile to himself.

When they walked through the doorway of the spacious living room, Ebitani was slightly shocked to see Yamazaki perched on the couch sitting proper and stiff. It was a bit rare to see the strict, stern Blacksuit alone here, usually tagging along with someone.

“I invited Yamazaki for another bonding session. I thought, even though you aren't a certified Blacksuit right now, it would be positive for all of us. It's been quite a while and with all the work I've had piled up, I thought it would be good for us.”

Ebitani looked in between the man, eyes wide and a grin on his face. He knew what that meant. Bonding sessions. It just meant he was about to have some fun with his lover and ... his coworker? He thought it wasn't right to call him a lover at this point even though he did feel something for Yamazaki. Not just Yamazaki but all the Blacksuits.
Lost in his thoughts, Ebitani barely noticed as Tonegawa led him once again back to their shared bedroom with Yamazaki trailing behind. He could hear them making small chat but was so deep in his own thoughts about how he felt he could barely make out what they were planning.

“Ebitani? Are you alright?”

It was Yamazaki calling his name that pulled Ebitani back from his thoughts and looked around. They were already back in the bedroom, the full length mirror showing that both Tonegawa and Yamazaki were on either side of him. Ebitani grinned over at Yamazaki, noticing the almost worried expression behind his dark sunglasses.
There was an inkling of something inside Ebitani that told him he did care about all the Blacksuits. After all, if it wasn't for them, he wouldn't be here with Tonegawa like this.

“I'm fine! Just wondering when this bonding session will get started! If I had known ahead of time, I would have made an entire packet of what we could have planned together!”

Tonegawa shared a look of relief over Ebitani's head with Yamazaki, both knowing Ebitani had the chance, he would have make an entire small book of his favorite things that would take more time than the actual bonding session.
Instead of letting him getting too deep in thought once more, Tonegawa led the younger man by the shoulders to the bed to sit him down.

Yamazaki watched how Tonegawa handled the pregnant man, smiling to himself at how the leader of their group had such a soft look on his face. This moment made Yamazaki feel thankful he was together with his boss and Ebitani. Though he usually came along with the Blacksuits just for Tonegawa's sake, he was happy to be here for Ebitani. The baby growing inside the younger man could easily been his as much as any other Blacksuit and it cause a warmth to spread through his chest.

Not many words were said after that, Tonegawa helping Ebitani slip from his over sized hoodie while sharing a kiss. Yamazaki was flushed at the intimate sight, unsure of where to start in this so instead focused of just undoing his tie to help himself cool off from the sight of his boss.
The kiss started to heat up as Tonegawa climbed onto the bed with Ebitani, almost in a hurry to undo the younger man's pants. Yamazaki had to start to undress himself in an equal pace to Tonegawa, unbuttoning his shirt while struggling with his pants. It was strange for a clear headed man like Yamazaki to fumble around with his usual crisp uniform that the sight almost made Ebitani laugh if Tonegawa didn't have his tongue tangled with his.
Ebitani moaned openly as Tonegawa laid him onto his back, staring down at the flushed face before both looking over at Yamazaki who was a sight to behold. The strict Blacksuit's face was flushed, glasses askew and clothes hanging haphazardly from his limbs.

“Do you need help, Yamazaki?” Tonegawa asked even as Ebitani had to hold his hand over his mouth to hide his laughter.

Being caught in such a situation left Yamazaki to look down at himself before clearing his throat and adjusting his glasses.

“Don't worry. Please continue.”

Ebitani grinned up at Tonegawa before carefully getting up from his position on his back with a bit of help and crawling to the end of the bed. The grin on his face scared Yamazaki even as the younger man reached forward to tug at the belt that was undone.
Ebitani was laid on his side, careful of his position as he struggled just as much as Yamazaki to remove his pants. Tonegawa sighed, wondering how these two were part of an elite group. Deciding to ignore the mess that was Ebitani, he worked on his own part by opening a side drawer next to the bed and pulled out what he had been saving for a night like this.
The strap-on he bought wasn't anything new to their special nights but it had been a while since work had been keeping him busy.
Tonegawa watched with a glint in his eyes at Ebitani finally was able to undo the mess of leather and cloth on Yamazaki until they were all naked save for the glasses resting on their noses.
It was something that was hard to break for all the Blacksuits.

Once they were all settled with Tonegawa settled behind while slicking up the strap on he knew Ebitani loved, said man on all fours with Yamazaki standing in front of him with his already hard cock out, Tonegawa took in a deep breath.

“Ebitani, please let us know if we are going too hard, okay?”

Ebitani looked over his shoulder, grinning at Tonegawa before clumsily giving a thumbs up. That left the older man to want to rub at his temple at the simplicity of Ebitani's answer but instead took hold of his cock to line it up with Ebitani's already wet pussy. The opening was slick and ready from the teasing moments ago. The sight left Tonegawa to calm his racing heart before sliding slowly inside.
To hear Ebitani's soft sigh made Tonegawa smirk over at Yamazaki who seemed to be mesmerized by the sight before him. As if he had forgotten that he was here for some fun too.
Tonegawa gave Ebitani's ass a quick smack as if to remind him what was in front of him which made the younger man almost yelp! Glaring over his shoulder at the cheeky old man, Ebitani turned back around to see Yamazaki had scooted as close to the bed as possible with his cock bouncing in his face! The sight reminded Ebitani of their training sessions that led him up to this point in life. How Yamazaki could only watch Tonegawa as he fucked Ebitani.
This time, he had a plan. Yamazaki would only think of him.

Reaching forward with one hand, the young man took hold of the warm cock to lean in and give it a soft peck of a kiss. With Tonegawa going at a leisurely pace behind him, Ebitani could concentrate on pleasuring Yamazaki.
He wanted to see the usual cool headed Yamazaki shaking under his hands. It wasn't often he could feel in control and today he would get that.
After a few more kisses, Ebitani started to sway his hips just enough to soundlessly tell Tonegawa to go faster before sliding his lips around the head of Yamazaki's cock. The feeling of Ebitani's warm mouth left the stiff man to become even stiffer with his shoulders almost to his ears as he could only look down at Ebitani. It was a small triumph that Ebitani would take as he swirled his tongue around the shaft, holding back a moan as Tonegawa's pace started to pick up.
Tonegawa was already sweating, loving the feeling of the double ended strap on inside him as he fucked Ebitani.
He kept reminding himself not to go too hard in case Ebitani was sensitive but with how hard he kept grinding back against the older man, it showed that this was anything but painful.

“You can go harder, you know?” Ebitani suddenly said with his mouth full, making both men confused at first before Ebitani leaned into Yamazaki to take him as far as he could!

It left Yamazaki shivering, hands still stuck to his sides until he couldn't hold back anymore! He tangled his hands through Ebitani's short hair, clenching his jaw as he started to buck his hips against Ebitani's face! Tonegawa smirked at the sight, knowing how Ebitani loved to take more than he could chew but still started to pick up the pace of his thrusts.

“You're always so eager to please, Ebitani. Makes me proud to have you work under me,” Tonegawa praised, noticing at how Ebitani's hips were twitching.

He could tell the younger man was close and with how Yamazaki was moaning, it was obvious he was almost done.
Taking hold of Ebitani's hips that were swelling with the weight gain of the pregnancy, Tonegawa started to thrust with a new purpose. To catch up with everyone as they were close to coming. The toy inside him left him shivering, almost losing his pace but kept thrusting as he heard Ebitani moaning louder and louder on Yamazaki's cock.
The room was heated and Yamazaki thought he was about to pass out from it all as he looked down over his sunglasses at Ebitani who had his eyes rolled back while drool dripped from his lips.
The sight was all that Yamazaki could handle and with a soft warning through his clenched teeth, Ebitani was shocked when his mouth was suddenly full! Yamazaki was left panting as he slid out from Ebitani's mouth, watching as the younger man almost flopped onto the bed as Tonegawa kept thrusting!

“S-Sensei~”

Ebitani moaned out something he still had a hard time getting over, making Tonegawa clench his jaw and thrust one last time, shivering as they both rode out their orgasms.
Yamazaki was left to sit on the edge of the bed, trying to catch his breath as Tonegawa pulled out and helped Ebitani sit up properly only to sigh at the sight.
Ebitani was almost passed out, tongue lazily slipping out of his lips with cum still covering him.

“At least clean yourself up properly, Ebitani,” Tonegawa scolded as he reached over to the bedside table where the tissues sat.

Yamazaki flushed, hurrying to grab them for Tonegawa who smiled up at him.

“Thank you, Yamazaki. You've done well tonight. I'm sure next time, Ebitani will at least be awake to thank you as well.”

Yamazaki felt embarrassed knowing he had some part in putting Ebitani out of commission for the time being but he couldn't help but smile at Tonegawa.

“Anything for you, sensei.”