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)