Moyu, the eldest daughter going through a rebellious phase; Kotori, the second daughter who is a bit shy; and Fumi, the energetic third daughter. Three sisters along with their older brother, the close-knit Rindo siblings were living their usual, heartwarming daily lives. But one day, the sisters discover that their brother is moving into a university dormitory next year...?! The final year for the older brother and the three sisters, the days of moratorium begin now.