The children of the partner of their parents' remarriage were ex-lovers?!
Moves in with her ex-boyfriend Mizuto Irido when their parents remarry.
A relatively introverted high-school boy with high intelligence
She was able to enter the same high school despite poor grades.
She a short yet athletic high-school girl
A frivolous and popular guy, called himself "Read Only Member"
She remarries Mineaki and becomes Mizuto's stepmother.
Mizuto's father. He remarries Yuni and becomes Yume's stepfather.