For now it's very buggy and the game is badly done on the mechanic sense. Overall this game feels very random and with no sense of direction, it needs a massive improvement on the presentation, basically making some proper stat windows, changing the font and the default way options appear during the game and an overall improvement to the way characters talk or interact.
Other than that it needs to reduce the randomness and add more information, for example each day define what the girlfriend is gonna do at what times, if you want to maintain a part of the randomness then perhaps add some "free time" during the day in which she may choose to appear on a random place, related to the more information I meant is exactly her schedule and more information of the girlfriend (such as fetishes developed, her corruption, love value towards other characters...)
Related to the futanari girls they need some schedule too, they can also have a bit of free time each day but we need something defined, also adding a profile window for each girl that tells the information we know about them would be really good (perhaps even some corruption value and the fetishes they have).
Talking with the girlfriend should be expanded a lot, at the very least we should be able to tell her to "be aware of..." or "be friendlier with..." and be able to talk to her about her and ours permissions, which should at the very least be related to:
-Sexual freedom: Convince the girlfriend to let you fool around with other girls.
-Be more kinky in bed: Convince her to spice the things up in your relationship
-Give permission to fool around: The girlfriend will offer less resistance to other people advances.
-Ask her to have a sexual interaction with a certain person: We will try to persuade her to have some kinky action with a certain character.
Overall the requests should be related to her corruption level and our influence (which should be an additional stat that would increase each day while you maintain a relationship with your girlfriend over 80)
Lastly we need an overall plot that makes us feel the game more alive, for example having a plot related to Samantha trying to get in control giving her a more antagonistic feeling would be nice, but that's about it.