I think the title kind of gives up the plot on this one. I hope you're happy sh*t woman. I'm betting she dumped him because she was a lesbian, she didn't want to tell him that, and now she is in a relationship with mc crush.
I'm even thinking she wished upon the star to make him see things on her point of view, that's why they're swapping bodies every other day. I'm pretty sure it's gonna be very funny manga but it'll hit the hardest on drama chapters
Painfully contrived to the point of silliness, like the writer randomly picked three annoying manga tropes and blended them up. Uninteresting body swap gimmick, fake NTR bullshit and upcoming tedious love triangle slop. Ex-girlfriend sucks too, so obviously the writer will try to make her sympathetic.