What is this picture about in Mirai Nikki?
If you watch the OVA ("Redial", which adapts a 2-chapter manga), it'll make more sense. In brief:


   Yukiteru-2 has been deified in world #3. Yuno-3 is initially unaware that Yukiteru-2 exists, the whole Future Diary thing, etc., but Murmur-2 eventually transports her to Deus-3's metaphysical space where Murmur-2 is imprisoned, whereupon Murmur-2 imbues Yuno-3 with Yuno-2's memories. She then goes and finds the now-deified Yukiteru-2. The OVA ends with Yuno-3 and Yukiteru-2 meeting, but I imagine the implication is that they create a new world together afterwards, as at the end of episode 26.


Er, at least, I think I have all the world numbers right, but it's been a while.