start is bully comedy but later it happens here
http://www.mangago.me/read-manga/porno_superstar/
this also fun bully but later seme serious and regret it
http://www.mangago.me/read-manga/koi_shitemasen/
this are diffrent typ of yaoi but every has a scene where the seme hurts his uke and later he regret it
http://www.mangago.me/read-manga/taiyou_no_kikoushi/
http://www.mangago.me/read-manga/hinekure_chaser/
http://www.mangago.me/read-manga/baka_de_guzu_wa_daikirai/
http://www.mangago.me/read-manga/jackass_sawatte_ii_tte_dare_ga_itta_yo/
Is there any yaoi manga where the seme is really mean to the uke at some point (ex. says something hurtful in the heat of the moment, accidentally hurts the uke in a blast of anger though not anything abusive) and regrets doing so afterwards?