Supporting characters in the story help to further along the plot of the three heroines. They include Haruko Kamio, Misuzu's aunt and legal guardian, who Misuzu refers to as her mother despite Haruko actually being the sister of Misuzu's real mother. She has found it difficult raising Misuzu, and tends to distance herself from Misuzu for personal reasons. Hijiri Kirishima is Kano's supporting character, and is her older sister. Hijiri runs the local medical clinic in town and looks after her sister like a mother after their parents died. The last supporting character is Michiru, a playful girl younger than Minagi who plays with her often. Michiru usually gets in disagreements with Yukito, often involving playful violence, and follows Minagi around like a younger sister.