Tomohiro lives alone. But one day, Michiru, his older brother's wife, and Hitomi, his older sister, come to his place and start living there. Hazuki, his PE teacher, and Reiko, a daughter of a caretaker of his apartment, also join them and his life suddenly turns into a paradise...!

Tomohiro lives alone. But one day, Michiru, his older brother's wife, and Hitomi, his older sister, come to his place and start living there. Hazuki, his PE teacher, and Reiko, a daughter of a caretaker of his apartment, also join them and his life suddenly turns into a paradise...!