Basically it was a story with a black haired girl who was obsessed with this blonde haired top idol. She wanted to mark an impression on him so she got hit by his car of some sorts, and he started panicking. Some black haired guy coincidentally stumbled upon them on the road and helped tie her up in this body bag, just for her to get disposed of. Fast forward, the black haired guy collects her body and takes her to some secluded little shed and she’s somehow alive. The same guy becomes the idols manager or his worker or something. The idol is blonde, the strange, yet devoted guy has black hair, and the supernatural girl also has black hair. I think the idol had purple eyes and the two black haired pair had red eyes. Anyway, it was a thriller or horror of sorts, maybe supernatural?.. I have vague memories of it.