月の光の鎖屋さん/ Tsuki no Hikari no Kusariya-san

"I'll take on all your pain and suffering." A slightly dark fantasy romance novel about spending time with a young wizard.

A full moon night... Lost and at a loss, Serena (protagonist, name can be changed) was in tears and was telling her fortune with a tarot card she picked up on a whim, when suddenly, a mysterious light overflowed. When she opened her eyes, a strange boy was standing there. "I'll take on all of your pain, suffering, and sorrow." The boy's name was Lumiere. He called himself a wizard and proposed a contract. Believing it to be a dream, the next moment they made the contract... The image of herself reflected in the mirror had been transformed into a beautiful bisque doll. Now a doll, Serena was led by Lumiere into the mansion where he lived...