While Hotaru is spending time at a cafe with her close friend, she witnesses the relentless breakup of a handsome honor student, Hananoi. Encountering him sitting alone in the snow on her way home, she extends her umbrella to him in a gesture of kindness.

The very next day, Hananoi appears in Hotaru's classroom, asking her to be his girlfriend. Despite being rejected, Hananoi sticks closely by Hotaru's side, performing selfless acts in hopes of pleasing her. Hotaru begins to feel emotions she had never felt before. Believing that these emotions could blossom into love, Hotaru agrees to date Hananoi.