In the second year of high school, the homeroom teacher dies in a murder case. The main character, Maoka Riku, is elected to a troublesome committee and soon finds himself involved in a murder case. Who killed my homeroom teacher?
Meitantei no Jouken is a completed manga by Hyuuga Natsu, first published in 2022. It blends thriller, romance, comedy and crime. You can read all 12 available chapters of Meitantei no Jouken online for free on MangaPulse; the newest is Chapter 12, added 2023-07-23. The series is finished, so you can read it from start to end in one go.