Couple 1: Sexy & beautiful Kayama X Saiki falling in love, I don't know why it took a third person for Kayama to understand that he did love Saiki.
Couple 2: Shuusuke X Misaki, short and bittersweet. Meet in a bookstore that closes down but they are still deeply in love and so adorable!
Couple 3: Fuyutsuki X Sano [seems like a S] that definitely love each other but separated by Sano's position.
Itoshii, To Iu Koto