Apparently you do not understand what your credibility remarks are about.
It does not refer to art. The character's appearance, more or less realistic, is the choice of the creator. It is accepted or not. Aqua and Daisy are simply women with an exotic appearance. However, the lack of credibility in the behavior of the heroes bothers much more. In this case, the impression is growing that the creator is not old, disregards the fans / players. Simply put ... it comes shortcuts and does a poor job.
Such a bad job in terms of feature is the story of Jenny. Why? Because in this story, Jenny is totally dependent on MC's financial support. Jenny is not in a position to let her dictate the terms. She has no money to get from, but MC has a lot of women who can fuck.
In order for Jenny's story to be credible, she should realize that by doing so she lowers her chances of getting help from MC, or have an alternative way to get money if she refuses to finance by MC.
Yes. I know it's a game and most of the players will pay Jenny to get the stats and bring her story to an end. Even though they would like to do it the most.
In this story, Jenny behaves irrationally, because she herself sabotages her chances of getting help from MC. And MC also behaves irrationally because it helps when every sensible guy would not do it in such conditions.
