Chikan Saresou ni Natteiru S-kyuu Bishoujo wo Tasuketara Tonari no Seki no Osananajimi datta The Girl I Saved on the Train Turned Out to Be My Childhood Friend

Synopsis

While on his way to school one morning high school second year Ryo Takamori saves his childhood friend Hina Fushimi from a sexual harasser on a crowded train. Although the two are practically opposites in appearance and popularity, not to mention the fact they haven't spoken since middle school, Hina finds herself smitten with the oblivious Ryo. A frustratingly sweet, zero stress romantic comedy! (Source: Yen Press)