ryanm390

Mahiro Fuwa, a teenager whose family was mysteriously murdered a year ago, is contacted by Hakase Kusaribe, a young woman who stands against her clan since they left her stranded on a deserted island. As the two decide to help each other, Hakase's quest to oppose her clan brings to light that the Kusaribe clan intends to awaken the "Tree of Zetsuen" whose power can bring chaos upon the entire world.

Sora and Shiro are a pair of siblings, brother and sister, who are well known as brilliant. Yet they are NEETs - useless to society, and (Not in Education, Employment, or Training) - and even worse they are completely house-locked shut-ins (hikikomori!