Shöta Machiya, a high school student with an interest in building rockets, is friends with Asuna Ayase whose father was recently killed. Fumika, along with her talking staff, Kanaka, comes to deliver a letter to Shöta which was written by Asuna's father after he died. The letter is addressed to "Ayase's lover", so for the time being Shöta cannot accept the letter until he starts going out with Asuna; in the meantime, Fumika waits for him to confess his love to Asuna...