http://www.mangago.me/read-manga/oboreru_kemono_no_koibito/ (i think there is a scene where he does it while the uke is sleeping or keeps doing it even after the uke sleeps)
http://www.mangago.me/read-manga/gokudou_darling/ (i think he only molests him in his sleep)
thanks !!!(^o^)/
the summit
http://www.mangago.me/read-manga/puchitto_hajiketa/
I'm not really sure if this is a good one to recommend. He sort of tries when the guy is passed out but the guy wakes up and tries back... It's complicated.
koisuru boukun ... i think at the start
any yaoi where the seme take advantage of the uke bring drunk or have sex while he's sleeping ?