Responses
Is it shounen ai? If so,
this might be it,
Film emperor's reincarnation script
http://www.mangago.zone/read-manga/film_emperor_s_reincarnation_script/
beta
mc is popular because of acting but got in a car accident and woke up in a different body in his archenemies bed. (It's all I remember ┗( T﹏T )┛)
the MCs name is Yuan Mu (I think..)