You're waking up due to something blocking your breath for increasing periods of time, only to realize that it's coming from kisses. Kisses from Nepgear. Kisses from a fully naked Nepgear laid on top of you… Which would be good if she wasn't your little sister. And if you could move, as, for some reason, your arms are tied over your head.

"Ah, you're awake, Onii-chan !"

She stood up a little straighter, watching you with a deep, although a little lustful look.

"What are you doing, Nepgear ?"

"You can't tell it yourself, Onii-chan ?"

"You know I can ! Why did you tie me up ?"

"If I didn't, you'd push me and ran away right now, right ?"

"Obviously ! You're my little sister, do I need to remind it to you again ?"

She stays silent for some seconds, until she gave a first move with her hips, making you realize you were already connected.

"…I don't care anymore."

"Nepgear ?"

"…I tried putting aside my feelings… I tried getting help pushing that away… I did everything I could to get rid of what I feel for you… But I can't"

She starts softly crying, while moving at the same time. Shamed and hurt by what she's telling you, she's watching on the side, trying to hold her tears while talking.

"Everytime I was about to put my feelings aside, one moment thinking of you and it was all gone. Everytime I pushed them away, they only came back stronger… And when I talked about it to Onee-chan and Uni… They told me they were against it, but that I couldn't seem to be resisting anymore… And that I should just let my feelings go out once and for all."

She watches you again, with teary eyes.

"What should I do now, Onii-chan ? I just love you too much for me to handle it alone…"

She watches you, awaiting for an answer, while you notice the loose on whatever tieing you isn't as strong as it should be, meaning you could escape now if you want. What would you do ?

You're watching your little sister, her eyes crying as she's literally begging for you to help her. Few people could resist this, and you're clearly not the kind who can resist something. Especially not from someone as close as her. Yet you couldn't resist throwing a witty remark to change the mood a little.

"…I think I need an adult right now."

"But I am an adult, Onii-chan."

You can't help but laugh sincerely, completely unexpecting her answer. She seems surprised, her tears stopped flowing as she watches you with curiosity, wanting to understand what was so funny.

"Yeah, right, you're an adult. Thus allow me to treat you as such."

To her surprise, you get rid of the ties binding you and hug her.

"You know the consequences of doing this, right ?"

"Yeah."

"You know you could never be able to show yourself as a couple with the one you love, right ?"

"Yeah."

"You know any people wanting to hurt us will be able to do so with even more ease than any normal couple, right ?"

"I expect that to happen."

"You know we can't marry, or have our own children due to the risks related to that, right ?"

"I already can't have any, due to my goddess lineage. And I don't care for marriage as long as I can stay by your side."

"…You know I'm probably gonna become older and die before you, right ?"

"…I know. I'll find some way to change that."

"You really have an answer for everything, right ?"

"I can't help it. That's because I love you, Onii-chan."

Her smiles strikes through your heart. She won, on every field, and you can't resist her anymore, beginning to kiss her as you pull her towards you.

However, things didn't end as good as planned.

Nepgear is a goddess in every sense of the term, including her strength. A strength she can't control during tense moments, including that one.

You died during the act, due to the peer pressure of her inner walls making your dick explode.

BAD END.