『やめてください、まぶしいです。』から一年、高校二年生になった杉山の元に、謎の転入生・堤が訪ねてくる。数年越しの再会を喜ぶ堤とは対照的に、いぶかしげな表情を浮かべる杉山と友人達。「オレはずっと覚えてたよ 誠士の事」そう告げる堤の笑顔は、何処か含みのあるものだった。一人で抱え込む杉山に手を差し伸べる日比谷と、日比谷の優しさを拒む杉山。そして、杉山にゆっくりと近付いていく堤。
複雑な三人の関係の行方は──…?

Sugiyama and Sasano attended the same middle school. During their first year in highschool in order to help further their slow-moving relationship, Sugiyama and Koga’s childhood friend, Hibiya, were watching over the two. Also with the help of the people around them, Sasano and Koga officially became lovers. Following the happiness of the two, Sugiyama and Hibiya began to deepen their relationship from friendship little by little. However, because of something trivial, they are still under the impression of “being friends”. Meanwhile, a year passes and a new encounter comes...