Read manga: Youkai Ninge

manga
Genres: Drama ; Mystery ; Shounen
Artists: Shinya Nobutaka
Status: ongoing
Latest chapter: Chapter 3
Updated at: Aug 25, 2019
Summary:

A boy wakes up in a strange room and finds a girl passed out with him. They find out they both have weird collars on. The boy has a phone which seems to be connected to the people behind this. They want them to do what?