I believe it started off at a sporting event and the fl accidentally pushed one of the members of the ml’s idol group. He had heel implants(?) in his shoe. The ml then goes on to dislike the female lead but as it is romance they eventually date and like each other. They are both in their own idol groups but she eventually pursues acting. There is another male idol group with a blonde boy that likes the female lead. The ml has black hair and the fl has light brown hair.

I think the manga you're looking for is 'Imitation'. Not sure tho, since it has been a while since I read it...😕