Emanresuym's manga / #Dom x sub(3)

Ch5. Sub teach has unmet needs, uses app, meets ex student accidentally. The student is dom, doms him, they have sexytimes (subspace so he doesnt recall and thinks nc at first). Dom blackmails w vid to live w him. Ignored needs, piles up, sexytimes. Dom is caring but then disappears a bit more.. sub looking for him, finds out from doms friend that he cant sleep without others due to dom instincts or something? Happy end.