Nasu-kun, as Mike calls him thanks to misreading his name the second time they met, is a solitary, dark, seemingly feelingless young guy. It seems that little things affect him, but when they do... beware! ^^;;; He is in the same class as Mike, Itsuki and Yuuta but looks older, he takes a good head on either of them.
He has an older brother but lives alone and works part-time in a "convini" (24h open convenience store). He is something of a womanizer as he gets girls to make his lunch in exchange of kisses. However, with Mike he is different, as they both fight around and start developing a strong friendship. He does fight against his growing feelings for Mike-chan and even tells her not to fall in love with him. However, there seems to be a woman in his past, his brother's girlfriend... was he in love with her? Is he still in love with her? Those are questions that make poor Mike-chan develop some good headaches... ^^;;;

In school he befriends Yuuta (or, should we say, Yuuta forces he to befriend him? ^o^;; ).

Yuuta is Mike's best friend since early childhood and lives in the next door to hers. He is a cute young boy who, as the story starts, enters high school. He sees Mike only as friends, which makes him unable to accept her feelings for him, but he himself develops a crush on Itsuki.

He seems to be a really carefree person, but can get really serious at times (but usually in a child-like-ish way... ^^;;; )

Itsuki is a beautiful cold student that is in Mike and Yuuta's class. At the start, no matter how much Mike tried to befriend her, she always was cold to her, but with the time, she warmed to Miaka and after certain incident, she became Mike's best friend and even defender! ^^

She likes gardening as much as Mike and takes care of the school's garden with her.