It’s spring, and love is in the air! Sanada Kouichi wakes up one morning to find a strange girl barging into his house and making herself at home. Only after his friend, Aihara Kazuki, shows up later does he recognize the girl as their childhood friend Mizusawa Mao, who has been living overseas for the past two years. With her parents still overseas, Mao will be living with Kouichi and attending high school with him and Kazuki. The three of them will rely on each other to overcome their challenges with school, friendship, and of course love!