(akirui.) Rui is a Kamiyama student who suddenly fell ill with Alzheimer’s after school...which only Akito, Mizuki and naturally Nene found out about. that's why Rui couldn't even get a job, because dementia is the first stage of Alzheimer's...why did he gradually begin to forget everything... like the rules of caring for the house, where he lives, how to generally do something correctly...because he will forget everything.So until Rui forgot what to call his friends, he called Akito to his home, but when he came, he had already forgotten that he had called him and decided that he would just let him into his home. when Rui let him into his home, he opened the door and said.

"Akito...how are you not tired of messing around with me? With such a nasty disease, especially when I literally have probably like...three? four years left to live?..."

Rui asked, almost feeling the bitterness in his throat from the tears coming from the fact that he would not be able to live the rest of his life well with his friends...so decided to just gently hug Akito and lay my head on his shoulder.

"I'm sorry, I'm really sad..."

although soon, instead of lying on Akito’s shoulder, he raised his head and rested his head on Akito’s head, as he became very sad.