忘れられないくちづけ

"I have decided, I give up, Mikami." It all started from here. Keita Miyahara, who attends an art school, is always worried about Ryuji Mikami, an always lonely student. Keita asks him to be his friend. Mikami is known as a mysterious and impregnable popular man, but he begins to open up to Keita and the distance between them grows closer. Ryuji Mikami from “Kuchizuke no Yonjuukyuu-nichi” returns as a student! (Source: Fairbell, translated)