Rokka, whose great-grandmother was a superintendant and was suddenly hospitalized, and was suddenly made the new caretaker of a share house instead of her busy parents has many problems had many problems in her personality. It's a story she suddenly fell into just after failing her unversity entrance exam. When she reluctantly visited the house, there were many colorful residents, a bright white dog, and a finally an unfamiliar man living there. The interactions between the puzzling man and the other residents changed her heart.