Oh! Holy (also known as Oh! Holy) is a romance manhwa about a timid and socially anxious office worker named Haru who accidentally summons a powerful and arrogant angel named Michael. Bound to Haru until she completes a mysterious task, the angel constantly causes chaos with his divine powers and blunt personality. Despite their clashes, a sweet and comedic romance develops as Haru learns to stand up for herself and Michael begins to understand human emotions. Readers enjoy it for its humor, the dramatic contrast between the shy heroine and the over-the-top angel, and the heartwarming character growth.