There are many perspectives to every story.
Lololo is really no exception, from what limited interaction he had with Kirby, he may not be the most techy with his resources, however.
Sakusa opens the door. He always does.
They're teammates first, barely even friends. But they hook up on the regular and it works. It's simple, easy. But then a fan gets too close, Sakusa reacts, and Atsumu is swept up in how quickly things can get complicated.