Is kamil a top or a bottom?
Now seriously, kamil knew our character because of their parents, but how he meet the members of the football team?
For the first question, look at this doc here.
For the second question, Tucker was pretty keen on making sure that all members of the offensive team knew each other so he made sure that they met at least once. When Kamil joined the team, Tucker introduced the offensive team to him. As for how Tucker met Kamil and why Kamil joined in the first place, those will be revealed at a later point in the story.