Keita, a high-school student, witnessed a kiss scene between Shin, his close friend and Megumi-senpai, a repeating student in his class. "Although senpai is cute, he's a guy" - when Keita criticized that, Shin started to cry and said: "I fell in love with him". Looking at the best friend he's proud of for his good looks being changed completely, Keita's feelings get confused...