Tomo is a monstrously built girl who is able to fight on par with men. She is best friends with Jun ever since he moved to her neighborhood and she came over to meet him. They hadn't been able to see each other until high school, where she now looks more feminine than when she was younger.
Tomo heavily likes Jun, but not knowing the "feminine ways" that normal girls take, she gets embarrassed with doing simple actions. Jun also sees her as a boy since the last he saw of her was when she was young and dressed and acted more like a boy.
