bruh a slap is not enough i wld have beaten his soul out of him

At least Hajin is not violent. Plus why would anyone beat someone in the first place. Especially someone who is drunk and not make rational decisions. Hangyum reason is going to be revealed in the next chapter. This is about chapter 46. http://www.mangago.zone/home/mangatopic/6623830/

In the comments is a link to spoilers for the next two chapters