I need a recap, I forgot what this is all about.

Spoiler - MC liked the ML brother, and unknowingly sleeps with ML under impression that it’s ML’s brother. The catch is ML is a pro swimmer and his time gets better while sleeping w MC and the MC just goes along with it. Now we figure out that they have more history than we think, and ML’s brother is not who the MC thinks he is. MC goes to America w ML to see more of ML’s brother, he doesn’t and stays with ML for his competition but the MC starts to become more “broken” with likely the memories of the place he used to live at and relation w ML. Eh there’s prob more to it but that’s what stood out to me bc I’m also like wtf.