The man after being abandoned by his wife had to take care of his two sons and Yayoi.
Neither her father nor step brothers cared about her, so she began to act as masculine as possible to be noticed by her family.
Because of her boyish behavior, Yayoi got molested at school, so to stop the bullies, she started taking judo classes. She began using her judo skills to defend herself, but stopped doing it due to a serious wound she made on a boy.
Years later she entered high school, masculine as always, but with a rather feminine body.
One day, a boy she liked invited her to a school party, where the guy got drunk and sexually abused Yayoi. Knowing her feelings towards him,