Does anyone has spoilers? I need spoilers otherwise I'll die from curiosity

Well not exactly a spoiler more like an assumption. I think that the one guy with black hair that glared at him is his older brother

I thought that too but I'm dying to know what those two are planning to do with him, like is it going to be a bad thing?

I knowww I am so excited for the next update(≧∀≦)

In the mom’s letter it said the brother is hiding in someone’s house and for him to go find this person, so that person’s probably Omi. But yeah hope they be good to him.

http://www.mangago.zone/read-manga/sense_of_loyalty/
Judging from this, I'm pretty convinced Rou is his big brother

You can read Sense of Loyalty and Oath Of Allegiance (which is the prequel of the older brother's story) (▰˘◡˘▰)

Well, I don't know for sure but maybe he has a hint:( hope nothing bad happens