What the mc did see was a ghost it was the ghost of his mother. When he saw the photo of the person he saw in his grandmas room it was her that he saw, and the gangsters really didn’t see anyone. The ghost of his mother actually appeared again briefly in the start of s2 when the new guys in his class was threatening him and his grandmother, she scared them away for them
Feelings of love are not THAT easily discarded or overwritten, guys, even if trauma was induced. Keep that in mind.
That's why we have so many victims of assault or other things stay/go back to their abusers.
I do hope the author doesn't just gloss over it so easily tho and puts some effort into showing both sides struggling and getting slowly back together.
It gets quite annoying to see authors use such heavy plot devices, pretend there will be effort into fixing it up and then just POOF, sunshine n rainbows after 2 chapters~.

Y'all didn't ML SA MC which is why he got a touch phobia and trauma...? Why's he pinning for him again