The Detective is Already Dead vol 01

The Detective Is Already Dead Manga Volume 1 is features story by Nigozyu and art by Mugiko.

The only surivor, me, and the detective's dying wish: their unfinished story.
I, an ordinary highschool student, Kimihiko Kimizuka,
I was embroiled completely flawlessly into a plane hijacking,
Where I became the assistant to the angelically beautiful detective girl I met.
In three years, the great detective and her assistant unfolded a dazzling adventure dram--
Before long, we were seperated by death.
This takes place a year after that.
The only survivor, me, and the detective's dying wish--