It is a surprise for Tony when Loki appears at his house two years after the battle. Slowly he pieces together what happened to the Asgardian that made him so jaded. Tony/Loki eventually.

Avengers High School AU. Loki's a nerd. Not just any kind of nerd. But a huge nerd. With a heart of lead. Why Tony Stark has taken an interest in him is beyond anyone's imagination. Maybe he wants to socialize him. He possibly sees the advantages of Loki being super cool. Or maybe, just maybe, Tony wants to be his friend, which is probably the most far fetched reasoning yet.

Tony knows he should be a lot more bothered about the god that's started to appear in his tower despite no word that Loki has escaped from his punishment on Asgard. That doesn't mean he is, not when Loki is actually answering questions that he asks.