Bedwarmer (слэш)

Loki, the third prince of Jotunheim, finds himself having to reluctantly escort the crown prince of Asgard and his companions around the palace of Utgard during the first visit to Jotunheim by Asgardians in a generation. Thor initially proves less arrogant and oafish than Loki had expected, but then apparently reveals his true nature with a demeaning order that Loki serve him in bed.
Loki feels that he has no choice but to comply with a smile on his face, as to displease Thor could mean that the Casket of Winters would continue to be held hostage in far-away Asgard. Loki is just as desperate to have it returned as his father, Laufey-king, is, even if their reasons for wanting it returned are different. Loki will acquiesce to being Thor's bedwarmer and anything else that is required of him as long as it means keeping the favour of the spoiled enemy prince.
And he has to admit to himself that he's not entirely opposed to being bedded by the golden-haired foreigner. However, the outcome is not what he would have wished for, and his problems with the prince of Asgard are just beginning.