Not Lives Series by Wataru Karasuma

From author and artist Wataru Karasuma, Not Lives is about a gaming genius who suddenly finds himself struggling to survive in a deadly game-as a girl!PLAY TO WINMikami Shigeru is a video game genius—he can play and conquer any game, and just as easily program his own. While planning his next project, Shigeru discovers a strange oddity among his stack of research materials—a game disc labeled NOT ALIVE... moreFrom author and artist Wataru Karasuma, Not Lives is about a gaming genius who suddenly finds himself struggling to survive in a deadly game-as a girl!PLAY TO WINMikami Shigeru is a video game genius—he can play and conquer any game, and just as easily program his own. While planning his next project, Shigeru discovers a strange oddity among his stack of research materials—a game disc labeled NOT ALIVE. Absorbing into his body, the disc thrusts him into a strange parallel reality where he becomes the “Player” of a real life video game, one where he controls the mysterious and skilled Amamiya Kyouka as his new female avatar. With rules to learn, other players to combat, and an omniscient GM overseeing the process, will Shigeru’s gaming skills be enough to survive in this brave new digital world? less

Mikami and Amamiya have successfully achieved their second win in the life-or-death game of “NOT ALIVE” and, for better or worse, it’s earned them an invitation to the game’s multi-player battle royale. With harsh battle rules, and even harsher participants, the two must struggle to overcome this most recent challenge. But when a single avatar approaches them amidst the chaos, have their finally found an ally or just another deadly enemy?

Maze Runner!The battle against the third-ranking Melodious Maze has begun, and it's a whole new game: underwater battles, skillful tactics, and physical endurance pushed to its limit. Maze is overwhelmingly strong on all fronts--much stronger than any opponent thus far.Mikami and Amamiya are forced into defensive mode at first, but they soon discover the true source of their strength.