Doomsday Carnival

Doomsday Carnival summary:

The story begins in midsummer. Along with more and more cases of disappearance, a bizzare urban gossip in the internet spread: Aliens came. They will randomly choose a group of people to offer a sacrifice to heaven. As a person who experienced the discussion, Lin Yi Ning testifies that the tale is partially false. Aliens did come, but as a member of the missing group, he was not pulled into heaven but instead was transported into another world. And in that world, waiting for them, is an endless horror game. What makes him wonder however, is that, as a most common otaku, how did the Public Enemy t.i.tle fell in his head?