Every time Minato makes excuses to distance herself from him, the depth of Tooru's feelings for her alter ego sways her from revealing the truth.

Her friend convinces her to go out dressed as a highschool girl, and she ends up accidentally bumping into her stepbrother Tooru.

Minato succeeds in convincing Tooru that she is in fact not his sister, but a highschool girl named Mina Noguichi.

Her reason for dating him was to obtain vengeance for all the troubles Tooru caused her in middle and high school.

He's a handsome young man with an expressionless face who has been sleeping with numerous girls ever since middle school.

Later she helps Minato by lending her clothes to wear as Mina, giving her advice and teaching her to do gyaru style makeup.

A member of the neighboring universities' Japanese history appreciation club and an architecture student.