This anime is just plain bad. It had potential, but in the end it's just disappointing. The only reason why I even managed to finish the whole thing was because things didn't become clear until near the very end. If the plot was written differently, it would've been more successful ending at around maybe 12 episode. [spoiler] Because the whole time it was about Aiba taking revenge for Yuno and killing most of his revived friends. The conflict would've end a lot faster if Kyoka,the commander of the NIDF, tries to improvise when the book of dead was used on Aiba by working with himfinding a better solution, but instead she tries to eliminate him and killing millions of people because things didn't turn out the way she wanted to.[end spoiler] I wouldn't recommend watching it, but after reading this and you still feel like watching it, you can go to doutei fansub website for subtitles of all 26 episode + the ova.