Wish there was the option to submit to Jean, using holy magic and possibly getting put in chastity and denial in return for the contract?
Although I don't mind the current design of the MC, another way to create a unique, but still isekai-ish design is to have him wear a hoodie with the hood on, covering his eyes.
Also it's probably better if the tutorial had you fight against your respective domme herself (holding back their power ofc) instead of some random slave, makes it more of a "tutorial" since you're going to fight Charon and not some slaves.
Otherwise, pretty great game, just that if I see a church in an RPG I'm taking the church route for the holy stuff, and there doesn't seem to be one despite the objective being going to hell and defeating the demon queen.