New novel of a doctor being haunted by a ghost that now hates his guts

It was in a secondhand store I saw it. I even showed my dad but when I came back the thing was gone! Someone had bought it. It had a beautiful scrapbook-like cover with intricate designs of brown red and yellowish stuff. Seemed to be new/contemporary.

The blurb; Its about a doctor who lives in a red light district. He is haunted by the ghost (of a friend?) That he killed in his home. When the doctor meets a (Mexican??) Girl who seems to influence everyone around her in a good way, the ghost gets furious cause the doctor is improving/getting bettered.

Gotta be so honest, it intrigued me cause I thought "Oh, is this toxic old man yaoi? With a ghost?' lmaooo

Pls help me find it. I NEED this.