I wanna know too cuz the only thing I remember is that Minchan and Biwan met in the past and the goal was for Minchan to get rid of his other spirit that caused him misfortune. Said misfortune was controlled thanks to Bihwan giving him some of his spiritual power or smt like that.
But now I think Minchan doesn't want the other spirit gone because it is himself and all that

The side stories are still fresh in my mind that I've forgotten the main plot can someone refresh me