Lessons for Life (слэш)

After his attempted attack on Jotunheim, Loki should have fallen from the bifrost, but instead, he held on. He stayed. He now lives in repentance within the palace. His seidr bound and his sole visitor Frigga. He wishes he was anywhere else and has little motivation for anything.
But when he is tasked with teaching magic to a visiting mortal, he's soon pulled into the bright orbit of Tony Stark. But far too quickly he realises that no matter how much he likes the man, this mortal isn't on Asgard for a vacation. Rather, the man is on the Golden Realm as a last request.