Wa Dinner No Ato De Manga Verified — Nazotoki

The story features Reiko Hōshō, a wealthy heiress working secretly as a rookie detective, and her sharp-tongued butler, Kageyama, who solves cases with brilliant deductions while insulting her intelligence.

Petit Comic (Shogakukan) from April to November 2011. Volume Count: 2 Tankōbon volumes. nazotoki wa dinner no ato de manga verified