Um, I haven't found it here yet but there is one I read that's called "Crimson Spell". You can find it at MangaKong.com under the letter C (obviously) and it's near the end. I hope that helps and I'm sorry if it didn't. (It all goes very fast so *the deed* happens in the very first chapter.)
http://www.mangago.zone/read-manga/aisaretaino/
It's pretty hilarious for me.. ^^
Thank yoou both of you ^-^
No problem, Hon. (^‿^✿)
Any yaoi manga where the uke is asleep or passed out and in the mean time the seme undresses him and etc.. Thank you! ^-^