Mitsu Hanasaki is at first sight a harmless and petite girl, who has a weakness for sweet things. But when things get serious, she knows how to defend herself! But when her classmate Kumagaya, who is described as "Cruel Grizzly" at school, is approaching her in the train, she is terrified! However, Kumagaya is a gentle boy who loves handcraft, secretly working under a secret identity and making cute things. Can Mitsu still resist ...?