good day/evening everyone so i just want to ask of the sauce of this manhwa (bl btw) cus l...

good day/evening everyone so i just want to ask of the sauce of this manhwa (bl btw) cus like i forgot it and it was something with summer or idk, the story abt is two childhood friend then suddenly they crashed then the other friend got switched soul with the other ml is like blond (he use to call the uke(?) yellow belt cus that was the only thing he remembers abt him) and then the side ml has like red hair