Mirai Nikki: Redial is short. It showcases the life of Yuno in the 3rd world, the world in which her parents didn't drive her into insanity. She's like any other sweet and cute anime girl, but you knew that already if you watched the last episode of Mirai Nikki. Because of that, expect A LOT of recaps.
In the end, Mirai Nikki: Redial is a cute little addition to the ending of Mirai Nikki's last episode, and it has a cute little message about how love can transcend even dimensions. But it's not that important to the overall story.
Mirai Nikki: Redial is low key a waste of time, but if you have that time to spend, go ahead.
