Usotoki Rhetoric

Usotoki Rhetoric (嘘解きレトリック) is a shojo manga by Ritsu Miyako. It began its serialization in the manga magazine Bessatsu Hana to Yume June 26, 2012.

Plot
As long as she can remember, Kanoko has always heard the sound of a bell when someone lies. Not wanting to trouble her parents any further, she sets off for the city, and winds up meeting an strange detective. She becomes his assistant, and together they work to solve cases with the help of her power.