The Detective Is Already Dead Vol. 1

Kimihiko, a young man who often gets unintentionally caught up in various incidents, becomes the assistant to an angelic girl and brilliant detective named Siesta, and the two spend three years together globetrotting and fighting against evildoers on dazzling adventures. But they are forced to part ways when one such adventure leads to Siesta’s death. Over a year has passed since that turbulent time, and Kimihiko, having returned to his normal life as a student, is now in his third year of high school. However, a chance encounter with a classmate will lead him on an epic adventure that will connect the past and the present.
Notice: This book is written in Japanese.