Just to get out of the way, I think incest is weird, no matter what form. That being said though, my sister is fucking weirder. I've got nothing against her, but I think it had to do something with the Citrus manga. She was a normal girl up until she picked up on that manga. I don't blame her, I thought it was alright, but she took it too far.

She was playfully flirting with me and wearing nothing but her underwear around me since she picked up Citrus. I thought, "Ok, she's just being a tease," but she wasn't. I was used to seeing my sister naked, at least her chest. She always tried on my clothes and vice versa since we were about the same size, she was just slightly smaller though. Her being naked hasn't been the same for me though. She's always did provocative poses, like leaning her rear against mine, "accidentally" dropping whatever was conveniently in her hand. Reaching over whatever is above my head to press her chest against my face. Normally, I would be annoyed by these constant antics she's pulling, but, and I hate to say it, she was giving off this odor that made me aroused. This behavior of hers continues without rest. A few times she would sneak in the bathroom to take a shower while I was already in it. Shocked, but I didn't do anything about it, nor did she. We just swapped places to use the water. If I think back on it now, I think it was because she was a bit afraid. She shook with nervousness if I remember right. I remember eyeing her while she was turned away from me. The warm feeling around my crotch always ached when she showered with me like that. I wanted to touch her. I knew it, but I never acted on it because it was a horrible idea, or at least that's what I told myself.

This is dragging out, lets get to the point. I live in a condo by myself for the most part. I had recently gotten a new gig, and my sister wanted to celebrate with me. I'm pretty introverted, I din't want to actually go anyway, but she promised me that she'll bring the supplies. We got some alcoholic drinks, and put on the latest episode of ReLife, and just relaxed. I'm easily pressured, so she used the, "I bought all this, and you're not going to drink more?" excuse. I'm pretty weak with alcohol, two bottles will do me in. She was making me down shots though, and I was getting extremely inebriated. We were about a third through the episode before I wasn't able to focus on it anymore.

I don't recall going to bed, but I do remember waking up and feeling someone undress me. I bob my head around in the fairly lit room, trying to figure what was going on. The alcohol still had its grips on me, but I was naked, and so was my sister next to me. Her face was red, giving off the alcohol flush. How much time had passed? Before I could even get a word in, she started to press her lips against mine. Soft and moist from the lip gloss she normally has on, mango? It was sweet. Must've been mango. Wait, no, this isn't what was supposed to happen. I was trying to tighten my lips, but the aroma she gave off made me slack jawed. I could feel her tongue slipping inside. I pushed her away, at least what you could call a push. She took it as a sign of foreplay with how weak it was. She held my hands up, mounting on my stomach. She closes the small gap between us, kissing hard. I could still stop this, I just have to shove her and walk away. All I have to do is push her off me and then I can just-

It’s definitely mango. My weakness.

I think the drunk side of me was just taking over me, because there was nothing I wanted more than to just smash my sister. I gave way. I had to, she broke the barricade of my lips and I could feel her tongue slip inside with ease. Her tongue was examining my mouth, mapping out every tooth and feeling every little dimple on my tongue and beneath it. And I guess it would be fair if I didn’t do the same. I decided to explore her mouth as well. This went on for a bit, our tongues swirled around, licking each other’s lips. Mango is just cheating. It was hard to breath with how little breaks she took. She broke away unexpectedly, leaving my tongue lingering for a bit. A string of saliva glistening from from the lamp could be seen slowly descending onto my chest. She gave a triumphant look, looking at me with my mouth gaped open. She fucking got me.

“Well, I guess that’s good, maybe we shhoould call it a night,” she said triumphantly. What a fucking tease. I decided to remain silent. “It is getting late anyway,” she says as she moves the small string of saliva that was drooping on her chin.

“I..“ was the only word I could manage to say while looking away from her.

“Sorry, what was that?” she says with a stupid grin on her face. She was getting over-confident.

“I’m not begging,” I say to her, covering the lower part of my face to prevent her from seeing my redness.

“Uh-uh, you’re going to beg if you want more,” pointing her finger at me and making circles on my hand that I’m covering my face with. She was cocksure, but even she was a little weak to the situation. I could feel her slowly grind against my stomach, curing whatever 'itch' she had. The view of it all was just too much for me. I let out a muffled sigh. I’ve already lost, what more is there to lose? I move my hand and grab hers, and licked it. Clearly she wasn’t expecting it given her wide-eyed expression. She was enjoying it though. She was... I was rolling my tongue around her fingers until she pulled out. “That’s more like it,” putting the fingers in her mouth and sucking my saliva off it. My turn to take advantage of her. I shoved her on my bed and pinned her down with my hands latching down on her arms. Her hair laid flat on the bed, spread across from the impact, what a hot mess. “Ho-ho, What ever shall I do! I guess I am defeated and must reward you. Go on! Have your way with me~” she says in a mocking, but strangely provocative voice. She had tan-ish skin, and perfect breast with adorable nipples. Wait, no tan lines? That’s… concerning. Tanning salon? Whatever.

Now that I see every parts of her body, it's clean as a whistle. Not a hair on her body aside from her head, wait, was she prepared for this? I wasn’t nearly as kempt, I did shave recently though. I lower my head, kissing her neck, going down to her break, slightly playing with her nipples and sucking on them. Playing with her breast proven some results as she quietly moans. I make my way down, kissing every inch on the way down. Until I reached her crotch. I stared,, admiring the view, but my patience wore thin as I nibbled on her inner thigh. I could feel her giggle a little, but she was enjoying it. I started to make my way in, slowly licking her slit. Tasting her juices. It didn't taste like anything, just slightly, slightly metallic. She must've clean a great ordeal before she came over, but that made it all the more enjoyable. I kept hearing heavy breathing, I looked up seeing her cover her mouth with her hand, trying to prevent any noises from coming out. It was kind of cute.

I started to slowly enter in her with my middle finger, giving myself time to breath. She gave a small, tiny gasp, but gave effort to try to contain it. Her other hand was right beside her, grabbing the fabric on the bed. I kept kissing her inner thigh, her skin is so soft, she smelled fruity, but her own body odor was what was doing me in. I felt her trying to push me away gently. I couldn’t stop there, I had to go for more. I lean back in, this time flicking her clitoris with my tongue while my middle finger was punishing her from the inside. She wasn’t ready for that and sat up right.

“Ahhh! C-calm down!” she stammered, trying to push my head away. “I-I’ll cum too soon.” Hah, who’s showing the weakness now? I wasn’t planning on stopping, I removed my finger from inside her and lifted her legs over my shoulder, grabbed her waist, and slid her up the bed, and up against the wall. I was on my knees on the bed, pinning her on to the wall. Guess who's been going to the gym since they're fucking single? “Hey, HEY! Put me down!” she yells, trying to push my arms away, but she was weakened. I kept tonguing away at her clit, circling around it. “Ah, stoooahp,” she says, trying to prevent me from carrying her, but we both know she’s enjoying it. She’s the one that doesn’t like to be dominated. I felt her slightly struggling while she’s being held up, but she’s just so weak at this point. I lightly sucked on her clit, while flicking it with my tongue. That was enough for her.

“I said StooaaAAH-“ she was cumming. I decided to hold my position and enjoy her nectar. She wasn’t flailing anymore. She was twitching slightly, I could feel it on my shoulders. She was squeezing my head with her inner thigh, I could feel her stomach resting on top of my head, and she was clawing at the back of my head while she came– Ow.

Then she went limp. “Mmm-ah… Ha…” Heavy breathing came after. With her body arched over my head, I decided to put her back down. She was wet, either from sweat or from me, I don't really know. I lean in close, sharing her sweetness with her as I let my tongue melt into her mouth. She seems out of it, or most likely unconscious. It felt wrong to make out with her at that point. But for some reason, the whole sleep rape-ish feel excited me. I guess even I have my needs.

To cut it short, I fell asleep next to her. I woke up after that, only to find out the morning never came. It was still night. My sister was gone, and I was in a completely different room. Oh no, I knew what was happening. It was too soon. I ran out of the room, and looked around for what maybe a bathroom. When I finally found one, I went inside and turned on the lights to look in the mirror. I was a twelve year old boy. Fuck, I was in a different Shaku. I wasn't supposed to jump bodies yet. Not now. Something was off. There was an imbalance in the world, and I had to find out what. That's when I started my isekai story.