Butler Saionji's Great Reasoning (2018)

Hajime Saionji is the perfect butler and he works for a madame who is elegant. The madame is full of curiosity and has a pure personality. Hajime began to work for the madame before her husband died and they share a deep level of trust. One day, they a face murder case. The madame holds doubts about the murder case. Hajime uses his great reasoning powers in an attempt to solve the mystery.