The Contract Between a Specter and a Servant, Vol. 2 (light novel) — Michiru Fushino

Masamichi almost died in a hit-and-run, but was rescued by a mysterious, handsome man named Shino. Shino offered to save him on the condition that Masamichi becomes his “food” and it turns out he is actually a powerful specter. Now bound by this strange contract, Masamichi moves in with him. Disguised as a human, Shino runs an antique shop. Spirits reside in the store's wares, and it's said that they bring good luck to customers they're compatible with. Though Shino is unsociable, he is a great cook so Masamichi starts to feel comfortable with this new living situation. Then, a female writer visits wanting to use the store as material for her project...