Body swap

Bl

After death he woke up in body of student and meet again friend who was grieving after him

BL

Trope with reincarnating/ body swapping after death with memory intact and trying change reputation of his body.

It looks like body swap between fl's of diff worlds. 1. Lost her younger twin siblings and is transported into body with memories in diff world. In her memories last owner of body is talkiing with mysterious person like herself before... Teory: So they maybe swapped bodies? Or last owner died and onyl she swapped body. She met her siblings, who did not have their memories and lost their parents.