Just shooting in the wild, but has Peach Princess considered approaching (or has approached) Atelier Kaguya?
I know Kitty Media has released several OVA’s based of their titles (for example Midnight Sleazy Train), but the actual games seem to be unlicensed.
I’ve always been a fan of their Team Heartbeat subdivision - twincest in Saishuu Chikan Densha 2 playing no small part.