>>8308581Believe it or not, it is hard to answer this if you want a similar formula with BISHOP games: Choukyou (Rape / Mind break / Sex Slavery) and "Exclusive use of the Heroine for the MC only",
Just like the comment above me, most Nukige games that operate in the "Choukyou" Genre usually have their heroines to be passed around and fucked by several guys (or monster in fantasy setting, especially in magical girls genre). Hence these games has various scenes that BISHOP games never do, like Gangbang , the heroines becoming public cum dump for any passerby, or rape with monster elements like tentacles,etc. If these are to your taste, then try Liquid, Lilith, Guilty, , Tsurumiku, etc.
If you don't want the heroines to be shared with other guys besides the MC, then "consensual/Non-Rape" Nukige usually does this. Most Nukiges are in this category (if you exclude low budget NTR), so there's plenty of options but you will not see mind-break / sex slavery the way BISHOP usually do. But there are some games where you "train" the heroines to gradually becoming a massive pervert for you but in "consensual/Non-rape" setting. Generally speaking, the "training" part will note as vulgar and the heroines will not be slaves for the MC in the ending, just becoming a pervert. But if you want to see Nukige in great art styles, try Atelier Kaguya (or other Atelier brand but usually the art is not as good),Milk Factory, Escude (for raising stat simulation games), Astronauts, Waffle, Argonauts etc.
Otherwise, if you don't mind low budget ones in Choukyou genre, try Miel. Lune is a bit inferior in terms of budget than BISHOP but generally dabble in Mind Control. You can also check POISON.