I dont think this is his main story with the band. His Main Story, besides getting into her pants, is making her fall in love woth him. He clearly does everything to make her fall in love with him. And that is slightly obvious.
But that was in the first Pool Event, when she told him that. On the second one she wished, that he saw her touching her self. And she also admitted, that he is her type etc. There are many hints, that she is falling for him. Latest was the Hot Tube Event. Even with the wine she could stop him.