Future Diary, Volume 6 (Future Diary #24-28)

Yuno and Yukiteru have disappeared, causing worry among Yukiteru's friends at school. Wit the help of the police, Aru and the others find him in an old abandoned hotel, where he's being held prisoner! But things get worse when Yukiteru learns that the eighth diary holder is sending new attackers to destroy his diary... with a very special delivery method!