The stories center around Aya Tachibana, a sixth-grader who frets and obssesses over friends, family, grades, and more. One day, she joins the "Tantei Team KZ" (Detective Team Kazs) with four very idiosyncratic boys she met at cram school. "Tantei Team KZ" gets involved in modern-day cases, and even if they bicker from time to time, they collaborate by pooling each of their talents and skills to solve these cases.

[Source: Anime News Network]