Chapter 1: Raimon Mystery Inc. Is No More?!

This story is inspired by Scooby Doo and the Mystery Incorporated.

Raimon Mystery Inc. is a group of detectives who can solve a supernatural-related mysteries and capture a culprit behind the mask. However, Raimon Mystery Inc. has fallen apart as some of them are quit and Matsukaze Tenma, Tsurugi Kyousuke, Shindou Takuto, Nishiki Ryouma, Nishizono Shinsuke, Kirino Ranmaru, and Kariya Masaki are left. Later, a new member named Mari Blake joined to the team.

4 years later, a new mystery has awaiting for Raimon Mystery Inc. will regroup again.

So, what happened to Raimon Inc. during their journey in four years?