Chuunibyou demo Koi ga Shitai! Ren: The Rikka Wars

Rikka notices Makoto secretly handing Yuuta a flash drive and immediately suspects her boyfriend is hiding something. With help from their friends, she discovers that the device contains pictures of an idol Yuuta liked in middle school, which Rikka considers a serious violation of their romantic contract.

Yuuta appears to return the drive, but Rikka's lingering suspicion leads her to search his room and accidentally destroy it. Now both feel wronged, and neither is willing to apologize first. Their stubborn little cold war turns an embarrassing piece of Yuuta's past into a battle that even the Wicked Lord Shingan cannot solve with imaginary powers.