I Work as a Night Guard in a Lunatic Asylum. Rule Number One: Don't Trust the Doctor.

Help Me, Kind-Hearted Book Friend! I Was Looking for a Novel and Forgot the Title

The content is probably that the male protagonist is reborn as a child, in a systematic way. The more profound storyline is that the male protagonist's house is about to be demolished. There are many female protagonists, one of whom is the eldest lady. She especially likes novels about cultivating immortals and wants to be the master of the male protagonist.