Tagami, Itsuki

Tagami-sensei is a colleague of Haruhiko Shimotsuki. She teaches and supervises the swim team, and Chitose Misawa, the team's most powerful member, listens to her, which is why they work very closely together. Shimotsuki is likeable to her from the start, and that affection grows with time. However, when she overhears him and Chitose having sex in the pool showers, it stabs her heart, because she cherishes strong feelings for him. She is torn about how to behave toward him now, but ultimately passion gets the upper hand, and she enters a physical relationship with him, even if it means they must comply with conditions that leave them deeply ashamed. Gradually, she slides into the same dependence that already binds Chitose to Haruhiko.