forgot title of BL but badically chapt 1 or 0 starts off with ML asking MC to strip off, i...

forgot title of BL but badically chapt 1 or 0 starts off with ML asking MC to strip off, i remember one of them having white hair and the other black hair with like blue-ish shade? apparently MC stripping idk became some thing they do cus mc went off to say "how did we end up like this."