Kuroneko all of them, Blood bank, Dark heaven, Royal servant, Asa to Mitya, Caramel Honey, Circle, Given, and many many more which I actually do come back to from time to time for comfort (=・ω・=)
Korean no Katachi and Tomo-chan Wa Onnanoko. The latter because despite the fact there's an overlying plot, it's also episodic so you can reread it a couple chapters at a time.
Korean no Katachi and Tomo-chan Wa Onnanoko. The latter because despite the fact there's an overlying plot, it's also episodic so you can reread it a couple chapters at a time. Okarisu
Is there any Manga you wouldn't mind reading again and again?
For me, I'd say Koitomo because it's pretty short and the uke is fucking hot ლ(´ڡ`ლ)