Distent amalgam (volume 1-3 volumes)

Publisher: Shueisha
Author: Ryo Ishiyama
Size: 112mm x 174mm
Number of books: 3
Language: Japanese
Category: Shonen manga, manga
Latest release date: 2017-05-02

Synopsis:
Kosaba Rokudo, a friendly high school student, jumped into a railroad crossing to save children the day before the promise of a date with his childhood friend Yayoi.
When he wakes up in a mysterious facility, he is transplanted by a thermal cell by an organization named "Sai", and his body transforms into a huge bone monster "Gasha Skull" !!