Tantei Team KZ Jiken Note

Tachibana Aya is a sixth-grader who frets and obsesses over friends, family, grades, and more.

One day, she joins the Tantei Team KZ with four very idiosyncratic boys she met at cram school.

There is the glib and attention-grabbing leader Wakatake Kazuomi, the mysterious expert of personal relationships Kuroki Takakazu, the smart and stoic math genius Uesugi Kazunori, and the sweet-hearted Kozuka Kazuhiko who is good at social matters and science.

Aya finds her place among them as the language expert.

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.