Atrium Lovers

is a Japanese light novel series written by Shinjiro Dobashi, with illustrations by Ryo Ueda. The series began publication on May 10, 2011 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
The virtual world "Tokyo Sphere" closed for some reason. Maeda, a high school student, is consulted by Haruka Aohara, an idol in a class who usually does not exchange words, about her existence.

Tokyo Sphere admission ticket and a large sum of 1 million yen that I do not remember ── After that, Haruka who wants to investigate Sphere relentlessly invites several students besides Maeda to establish a circle I will do it ...

Is the ticket a welcome "invitation" for Maeda, or ── !?