Abarenbo Honey
You can check out this list!~ It's all about delinquents falling in love (Yaoi.)
http://www.mangago.me/home/mangalist/20941/
If you want shoujo then
> http://www.mangago.me/read-manga/iinchou_no_himegoto/ (this and the one below are the only ones I recommend for delinquents lol but I dont know what kind of tastes you have so you might like the others)
> http://www.mangago.me/read-manga/tamachen/ (hes not really a delinquent but...)
> http://www.mangago.me/read-manga/tonari_no_kaibutsu_kun/
> http://www.mangago.me/read-manga/tokyo_crazy_paradise/ (its super long and more adult themes and slow burnnnnnnn)
> http://www.mangago.me/read-manga/chunqing_yatou_huolala/ (shes so dumb and the art gets worse. adults themes)
Really want a shoujo or yaoi manga with a delinquent guy falling in love