What did hyeong oh's mom found in the basket of gifts?

A shoes from one of Heyongoh’s bullies. Namsoo’s first victim

I mean second victim. He’s been hospitalized because his tongue were cut off

Wth how did she know? Did I read too fast lmao sorry

I dont think so. The one who got his tongue cut off had red sneakers. I think it's yet to be revealed why the mom panicked.

I think its the shoes that were lost when the bullies humiliated Heyongoh in front of his crush

It's not the abuser's shoes !!!
In fact in Korea (and I think also in China) you should not give shoes as a gift! Koreans believe that receiving shoes as a gift will kill the relationship. The person in the relationship who receives the shoes will ‘run away’ from their significant other. That's why the mother was concerned to see that gift! It's just a Korean superstition!