Character profile
Shuusei Usui
碓氷愁生Biography
Shuusei Usui is a guardian and Hotsuma's childhood friend. Seemingly quiet and sensitive, he helps police solve crimes using a "sixth sense" and carries deep scars on his chest that seem connected to his frail health.
Story spoilers
Like Yuki, Shuusei was a girl in a past life and was married to Hotsuma.
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