Son of Odin

An immortal demigod lives as a despised, deadbeat husband to protect a noble family for five years and repay an old debt. Enduring his wife's coldness and her family's cruel mockery, he secretly crushes their enemies from the shadows. But when his five-year vow ends and the gods summon him back to Asgard, his arrogant wife finally discovers his true identity, only to be left with nothing but regret as he ascends to Asgard forever.