The Future Diary - Season 1 Episode 13 Number Withheld

When Deus realises that his assistant, Murmur, manipulated events to hasten Keigo's elimination, she claims she wants the game concluded before he has to "retire" and challenges him to a wager on the winner of the survival game, with her picking Yuno and Deus betting on Yuki. Yuki and Yuno go on a stargazing trip, but Yuno alters their destination along the way. Worried about Yuki's safety, Aru contacts Nishijima and they manage to narrow Yuki and Yuno's location down to a run-down holiday resort, enlisting Hinata, Mao and Kousaka to search for them. As they split up and search the abandoned hotels, Aru and Kousaka face various traps set by Yuno, while Hinata is tricked by a text message Yuno sent from Yuki's phone. When the others attempt to find Hinata, they get locked in a room which starts to fill up with gas. At the end of the episode, Yuki is shown bound to a chair, with an ecstatic Yuno sitting between two skulls.