В день, когда в искусственно созданном экспериментальном мире должен произойти конец света, две девушки ‒ человек и искусственный интеллект, находят что-то большее, чем просто друга.
Yô
When fourteen-year-old Yo is hospitalized she gradually develops feelings for Yayoi who is a nurse tending her. However, Yayoi leaves the nursing profession in favour of prostitution. Yo is disappointed, but turns to the older woman after she is the subject of unrequited love from her mother's man. The two grow closer and Yo is about to find out what motivates Yayoi.
September 20th. Sunny. I wonder if it bugs me so much because I can't see it. I've gotten totally obsessed with finding out what's inside that bump. It's all I think about on my way to school, in the bathtub, and when I'm trying to fall asleep at night. I mean, if I could just figure out what's inside that bump, I'm sure I could figure out lots of other things too.