Yes, there are many scenes that seem inconsistent from the player's point of view. For example, you want to date Jill because you are interested in her. Then you remember that she said that Bella advised her to go on a date with you. You can thank Bella, which seems natural to me and means nothing but a simple gratitude, or you can just ignore her. But if you decide to thank her, the MC will go out of control and jump on her with kisses in the library.
But damn, again, how could I miss this when I first played it. Bella in the library: "I did the right thing. This was for Jill. Married women don't fool around with young students." Okay, I get it, she's a little regretful that she can't/shouldn't hook up with him and that she herself pushed him to Jill. But then: "They aren't intimate with friends either. But that... that was different! It doesn't matter... I've stopped it." What is she talking about?