Looking for a bl manhwa

Ml was blonde and a fox spirit, MC had dark hair and was a human working at ML’s company. MC stumbles upping the ‘spirit’ side of the company and everytime ML tried to erase his memory in the past it didn’t work; MC is immune to their powers. MC somehow ends up with ML spirit core inside of him and ofc they have to f*ck in order for ML to get his core back.