HEY☆Bouya(1981)

Ichiya is the campus heartthrob, but little do they know that due to a familial power struggle he must hide that he was assigned female at birth! Or rather, his masculine name got him assigned male on his birth certificate, but Ichiya doesn't mind living as a boy at all! Living in his father second family, Ichiya and his older sisters seek to be legally recognized as his children. But his wife and daughters won't let that happen easily...

On top of dealing with rising family tensions, Ichiya is also experiencing growing affection for the new boy at school.

Note: Volume 3 contains the one-shot Boku no Obasan (ぼくのおばさん)