
I feel like I am reading a complete different story

Uh not really? Idk what side stories you've been reading but they're meant to build up from the story they're based on. They're SIDE stories, not DIFFERENT stories. It's supposed to exist in the same universe as the original BJ Alex, so it should therefore feel like it still exists within the BJ Alex world. It's a side story, not an alternate universe.

I think Hozumi's father is strict and heartless with him because of what his wife did. I mean I hope thats not the case because u cant make a child responsible for what their parents did

Yeah. I also think his father hurtful-hatred is because of the mother. Especially when he said "the same cloth.."
I was under the impression he meant to say: how both of them (mother and son) silently hoping/planning to run away from the father. Leaving him.
Maybe in the next chapter we would get the father's pov and the reason why(๑•ㅂ•)و✧
This is a pair I did not see coming!