Ako-sama no Chuuken

From [Chibi Manga](https://www.mangaupdates.com/groups.html?id=3006): Ako was a Yankee when she was in middle school, but then Ako entered high school. Mamoru, her childhood friend, is the only one who knows her secret. No matter what he says, to her, Mamoru is just a cute little pet. but when she said that she wants to get a boyfriend, Mamoru's attitude suddenly changed...