Lol, not a gang bang nor five some. If im not forgotten, he will just bang with the white haired for a bit or it was just the past idk i forgot haha, and then he just fuck with the brown haired guy and have lovey dovey time with him for a moment thats it but u can already guess who is the father tho ╮( ̄▽ ̄)╭
Yeah, but... when white hair was doing "damage control" (yuck) after he arrived late and kicked black hair out, the mc woke up and said "I need more" and white-hair said "why not? Let's do 'more'. After all, I'm already used to being used by you as a mere substitute for black hair...", then there's a 50 min gap and white hair reappears next to the sleeping mc without his shirt, smoking, so it's left open whether they also did it, or not.
Or until white-hair tells the *truth*, and is truthful about whether if he also did him that day without a condom, or not... (second yuck). Until now, white-hair didn't come forward because he assumed the mc hadn't gotten that very day, but in the period afterwards. Let us all hope he doesn't take a page from brown-hair's book and do something "similar".

Did they have a gangbang or a five some? Hot, but not my cup of tea.