The Future Diary - Season 1 Episode 7 Answering Machine

Reisuke tries several times to kill Yuki and Yuno, but the two of them thwart his attempts, soon realizing he is a diary owner. Yuki starts searching for Reisuke's diary in vain, while Yuno insists killing him would be faster. While chasing Reisuke with a hammer, Yuno ends up injuring Yuki's mother instead. Yuno figures out that Reisuke has posted his diary to himself in order to hide it and has Yuki intercept the delivery, but he falls prey to a poison gas trap hidden in the envelope. Reisuke challenges Yuno to a hide-and-seek game inside the poison gas filled house, promising the antidote if she manages to capture him. Yuno evades numerous traps set by Reisuke, but eventually finds herself at his mercy. However, Yuki intervenes, injuring Reisuke with a dart and giving Yuno the resolve and opportunity to finish him off. Yuno and Yuki collapse before managing to use the antidote, but Uryu, who has been informed about the situation from Keigo, appears and saves them. Before leaving, Uryu tells Yuki not to trust Yuno.