【Shijo Mako】Happiness After Some [Single Story].

In a world heading towards the end of time, the only girl living in the school building, Tsukasa, is trying to save her senior, Ai, who was attacked by a zombie and turned into a motionless zombie. After a diligent search, she finally finds a vaccine and administers it to Ai, who regains consciousness. However, when Ai’s body collapses and is stitched back together by Tsukasa, she is bewildered by the unfamiliar male genitalia that has become a part of her body. Afterwards, they go into the bathroom to wash their bodies, and their bodies are piled on top of each other. Tsukasa confesses his feelings for Ai, which he couldn’t tell her in the world before the collapse, and as their hearts and bodies touch each other, the yuri sex gets more and more intense.