Tsukiko Yano is a transfer student at a highschool where she doesn't find anyone or anything interesting. That is, until one evening when she sees her classmate Aya Utsumi swimming in the school swimming poo...

"I'm getting married, but don't abandon me." Kiyoko Ito, 85 years old. In the days when her dementia makes it difficult for her to even recognize the faces of her family, she is suddenly visited by her form...