Natsu no Kumo
Natsu no Kumo: Spinning Web is a Japanese manga series written and illustrated by Rokuro Shinofusa. It was serialized in Shogakukan's Monthly Ikki from September 2003 to March 2007, with its chapters collected in eight volumes.
Plot
In an alternate future, immersive online worlds are a dominant facet of society. To counteract the severe accidents caused by users violating mandatory playtime quotas, specialized doctors are integrated into the game to monitor and counsel the population.A high-level player, Coil, operates within this system. Living in isolation after his family was hospitalized, he sells his services to organizations seeking order. Coil utilizes a secondary robotic avatar, the Engineman, to permanently eliminate other players through torture and deletion.