 If you liked
Yankee-kun to Hakujou Girl
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 ...then you might like
Toorigakari ni One Point Advice shiteiku Type no Yankee
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In both series MCs look like a yankee, but are good people in reality. In One Point Yankee romance is only a subplot while in Yan-Garu it's the main theme of the manga. Also, in Yan-Garu characters are (mostly) teenagers while in One Point Yankee most of the characters are adults.