any romance manga which contains cheating?

How about those?
http://www.mangago.me/read-manga/mukizu_ja_irarenee/
http://www.mangago.me/read-manga/waltz_with_a_black_cat/

yaoi with cheating:
http://www.mangago.me/read-manga/michi_dzure/
http://www.mangago.me/read-manga/yachin_hanbun_no_ibasho_desu/ (ch.6)
http://www.mangago.me/read-manga/aishuu/
http://www.mangago.me/read-manga/overdose/
http://www.mangago.me/read-manga/ubawareru_koto_marugoto_zenbu/
http://www.mangago.me/read-manga/scarlet/

i'm gonna give them a try!
thanks:)

No problem! (▰˘◡˘▰)

thank you i'm gonna read them too :)

you`re welcome ヾ(❀╹◡╹)ﾉ~

Well you should try Overdose. It`s good ^^

(●'◡'●)ﾉ Hai!
arigatou gozaimasu ^^