Not 100% sure but you could try room to room, it sounds vry similar ♪
Double trap
Isn't that the opposite tho(? The one having sex in his sleep was the uke
I remember bells and shamanism being an important part of the story. And it was very new and only had one chapter
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this but its a manga
https://www.mangago.me/read-manga/nemuri_otoko_to_koi_otoko/
Its about a seme who has a split personality and sleeps with the uke at night. I remember that the uke tied bells to him to hear him if he woke up