Kimi wa Tayoreru Tantei-kun

Kyouichirou Oike is a high school student known for his slowness and laziness, but he also possesses an exceptional talent for solving complex and mysterious cases. His life takes an unexpected turn when he meets Kotomi Otokuni, a lively and assertive classmate. Due to her interference, he becomes involved in a case that puts her in danger. As events unfold, Kyouichirou must find a way to rescue Otokuni, who remains unaware of the situation she is in.