if your ok with incest I highly recommend this :
http://www.mangago.me/read-manga/ienai_itami_o_daite_iru/
When I read I found so many, but when I intend to find to add tag then I can't remember. (=_=:)
http://www.mangago.me/people/tag/2337/Hickey/
Overdose
Can you please recommend me a yaoi manga where the seme put a lot of kiss marks on the uke? or vice versa. Thanks a lot. ..