Kami Ni Chikatte Itsuwari Desu

Matsuri Momozono, the daughter of a Chinese restaurant owner, suddenly finds herself saddled with a debt of 300-million yen.
The only person she could turn to for help is a university lecturer who was an acquaintance of her mother...
"Don't believe in what you see." What is the meaning behind her mother's words?

(Source: Harta, translated)