Meitantei wa San Shimai!?

Synopsis

Anzu, Karin, and Lemon Kinoshita are three very ordinary, friendly middle school girls who are sisters. They were living a peaceful life, but one day, the eldest sister, Anzu, was suspected of being a thief! The three sisters set out to find the real culprit, but...!? (Source: Ciao Plus, translated) Note: Includes four extra chapters.