any yaoi where seme hurt uke and he regrets badly? Seme also tends to be possessive? Somet...

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scarlet

http://www.mangago.me/read-manga/scarlet/

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Not sure if this is one but

http://www.mangago.me/read-manga/hina_wa_mitsuiro_no_koi_ni_torawareru/

This has somewhat of a possessive seme. Plus there's a lot of drama but I'm not sure if its what you want

http://www.mangago.me/read-manga/totally_captivated/

Totally Captivated if you're looking for something long.

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