At this point, she is spending so much money because of them, and they are such an inconvenience to her life, that she needs reduction surgery. Also, I'm proud of this manga, because it still hasn't sexualized her chest at all, really.
Swear to fuck it would be awesome if this was a story about him learning sewing/fashion/materials in order to allow her to reach the heights she can in competition. Then the story can expand to other girls who have “unfortunate” blessings, which he has to understand and then make clothes for, and then come on to him, but he’s a one-girl type of guy. Supporting the highest-level competitors while bagging the highest-level girl is a tried and true formula!