Kobayashi falls in love with his kind mother, Mitsuha, when he visits a friend's house. The other party is a married person and the mother of her friend. He can't give up even if he knows it's a love that shouldn't come true. Kobayashi, who can't help but worry about Mitsuha, sneaks out of her room and goes to check on Mitsuha, but there he learns a shocking truth about her. Her secret feelings for Mitsuha, which she had intended to keep only for her admiration, begin to run out of control...
