Wait a whole da** minute, are alex and the current person possessing the ML's body completely different people!? 
Comment by Blowituplikeadynamite on My Husband Possessed the Protagonist - Chapter 2
2 Replies
@Blowituplikeadynamite Yes i believe so, well probably its more like when Alex died he entered the other world where he gained every skill, became competent and strong and then returned to his past life to keep his promise. But the guy forgot or lost Memories so he thinks he is possessing someone.
@Alcoholic Crusader that actually seems to probably be the case here 