I started this manga expecting "Kanojo X but they drink piss", what I got was more like "Punpun but with BDSM". Anyhow this isn't the regular jerk-off ecchi harem stuff with no clear goals or story, it's a complete and gripping story about fantastic characters that only gets better thee further it goes and the emotional roller coaster went straight off a cliff. It's more committed to raising the readers cortisol rather than penis. This also isn't very long, like any good story with a clear view of what it wants to be and to tell, rather than circlejerking for 300 chapters before getting abruptly axed.