Its called Somnophilia and ive seen a few lists with it
like what they^ said, there's probably some in here like that:
https://www.mangago.zone/home/mangalist/345256/
i'm aware of somno kink! however somno does not immediately equal to this specific situation
the main appeal is the person being very much awake and aware, flustered/turned on by the act. while somnophilia is way too broad unfortunately (though i do like it also)
I was reading this and remembered this thread, it happens in ch.1-2:
https://www.mangago.zone/read-manga/riman_loveho_danshi_kai/
this is awfully specific but can someone recommend me more manga with a scene when one person is jerking off next to another person who is pretending to be asleep? i really like this trope (?) but it's hard to find without tags... pls help a bro out