YUKINO Kyoko - 2nd year high school student whose goal it is to become "student of the year."

RENJYO Tamaki - Oldest brother, a 3rd year high school student.

RENJYO Mito - Middle brother, who is also a 2nd year high school student. A bit of a player, but also quite serious about his passion for soccer (?)

RENJYO Shizuka - Youngest of the three brothers, currently in the 2nd year of middle school. Suffers a bit from anemia so he often faints when he doesn't take care of himself.