The episode flashes back to when Yuno first falls for Yukiteru. Her emotional problems stem from being caged and starved by her parents, and in turn she cages and starves them to death. She then tries to sabotage a “date” between Yukiteru and the class rep Moe, but Moe turns him down anyway. Back in the present, Nishijima needs to know who the third body in Yuno’s house was. Yukiteru’s dad shows up at home, knowing he’s about to be caught by the police and wanting to spend his last day of freedom with him. However, agents from Eleventh kill him while they’re at a shrine. Yukiteru kills a couple agents in turn, then turns the knife on Yuno, learning from Murmur he can bring back his parents if he becomes a god. Yuno doesn’t resist, and Yuki spares her for now.
Oh man, poor Yukiteru. These last couple days have been pure Deadman Wonderland, and now he learns that the current god is literally crumbling away in his realm, now unable to further manipulate the “causality continuum.” Only the new god can bring back Yuki’s mother and now father – and I doubt any of the other diary holders other than him consider that a priority. Yuki may be a weenie but he is one of the saner characters, and I’m sure stabbing someone to death and using another as a human shield was tough to do and will haunt him. Unfortunately if he wants his parents back he’ll have to spill a lot more blood and shed more of his humanity; Eleventh is a tricky and obviously well-protected bastard.
We knew this score though. What we didn’t know was the slightest thing about Yuno’s past, specifically why her house had corpses in it and how she became the gorgeously unhinged lunatic she is today. Well, not surprisingly, the answer to both is abuse. Yuno’s parents were as cracked as she was, trying to mold her into an elite student through the use of incarceration (mirroring Yuno locking Yuki up earlier, in desperation), starvation, and general contempt for her very existence. Her parents were awful people, so Yuno paid them back in kind, but then she was alone. All it took was a token promise from Yukiteru to make her his ‘little bride’ for her to latch onto him, and presumably that’s when the stalker diary became active. Regular guys never interested her. It’s also clear she harbors no plans to become a god. If she has to die so Yukiteru can become one, so be it. By his hand, so much the better.