Next door to the apartment where Fujimiya Shu lives lives is Shiina Mahiru, the top beauty in the school. The two had nothing to do with each other. One day, Shu saw her in the rain and lent her an umbrella. After that, the two began to communicate in an incredible way. Mahiru couldn't stand Shu's self-degrading life of living alone, so she helped cook, clean the room, and took care of Shu in every aspect. Mahiru longed for family relationships and gradually opened her heart and started to act like a spoiled child, but Shu couldn't fully accept her kindness with confidence. Although the two were not frank, they were still shortening the distance little by little...