Not Lives Vol 4

Not Lives by Wataru Karasuma. A Sci-Fi manga rated Teen, published in English by Seven Seas.

Aspiring game designer Shigeru Mikami dreams of creating the ultimate game. When a mysterious disc labeled "Not Alive" embeds itself in his body, he begins seeing the world through his game avatar, Kyouka Amamiya, and is pulled into a deadly real-world game where victory is the only way out. A sci-fi action series packed with gaming twists and fan service.