Izumi Amakawa

This character is a charming but conflicted colleague who harbors intense, possessive feelings for Hiroto, leading to dramatic conflict with Kirari. Her actions, including stealing a kiss and causing injury, highlight a complex emotional dynamic. Later, her true identity as Hiroto's childhood friend, Hyoutarou Izumi, is revealed, connecting her to a past promise and a complicated pursuit of Hiroto, which still fuels her strong emotions for him despite other developments.