Everything about 美女
You can not make this happen with 成人. It's also additional formal than 大人 so It is really a lot more prevalent to utilize 大人 in each day speech. Also 成人になる particularly usually means "to turn 20". 大人になる ordinarily implies "to be experienced". 芳一は来年成人になる -> OK已婚的女教授艾瑪結識年輕的