Shinohara Mio

Yuusuke's cousin Mio is a high school student that goes to the same school as him. She is a honor student who enjoys being a class representative. She's got a calm, relaxed type of personality. She likes putting up a facade of being a "good girl" while in secret she has a hidden side of hers that loves sex. Although Mio considers Yuusuke a mere plaything, she'll feel disturbed by the prospect of losing him from her grasp once Misako moves in to Yuusuke's residence.