Only I KnowNew僕だけが知ってるんだぜ ; Boku dake ga Shitterun daze ; 仅我知晓的秘密 ; Chỉ có mình tớ biết thôi đấy nhé ; И лишь я знаю об этом

Due to certain circumstances, Heike Waku transfers to a new high school. There, he meets a very cool classmate named Oura-san. With a famous model for a sister and a face that never smiles, she seems like a distant and untouchable presence... or so it seemed. But by chance, Waku happens to catch a glimpse of Oura-san's dazzling smile. In that moment, his world changes completely! For that smile... I'll do anything!!