Yuki decides to visit his father with Yuno to retrieve a telescope, but when Yuno decides she knows best for her future husband, she kidnaps him. Now Akise, Hinata, Mao, and Kousuke to save their friend from a psychopathic stalker.

After a futile attempt at discarding Yuno, Yuki is faced with trying to overcome his weakness and fend for himself. The gang takes refuge at Kousuke's manor. The Diaries of Exchange reveal themselves for a battle between lovers.