help me find this bl manhwa, all I can remember is that the seme is from a special race th...

help me find this bl manhwa, all I can remember is that the seme is from a special race that eats flower in order to survive, and the seme doesn't like any particular flower, but the only thing he can take is the one grown by the uke. Extra he's kinda obsessed with the uke to the point of making plans on how to lock the uke up.