Kunavai

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!

Yukiteru "Yuki" Amano is a loner who spends most of his time writing a diary on his cell phone or talking with his imaginary friends Deus Ex Machina, the God of Time and Space; and Murmur, Deus' servant. One day, Deus gives Yuki a special diary, mentioning something about a game.

Light Yagami is an intelligent young man who resents all crime and corruption, and believes there is an unending increase in these things that he must try to stop. His life undergoes a drastic change when he discovers a mysterious notebook, known as the "Death Note", lying on the ground.