48 Sex Positions+: Restrained Tea Grinder

To answer Kurowa's question, my understanding is that 'siscon' only applies to characters that like their little sister.

I think this oppai doctor needs to visit me for illness treatment...

Ah, another 48 sex positions release, always nice to see such great illustrations.
Also liking someone else's little sister can probably still count? Like, siscon but...little siscon?