Ep. 31: Irritated Karin-chan
Aired on October 8, 2012

31
Karin-chan begins exhibiting disruptive behavior, prompting her friends to investigate the underlying cause. Honoka and Shin seek assistance from Mao-chan to understand the reasons behind her sudden change in conduct. Together, the group works to uncover the source of her irritation and determine how to support her through this difficult period.
Episodes
- Ep. 27 · Honoka Receives Encouragement to Confess Her Feelings to Shin
- Ep. 28 · Mao-chan and the devil children face inoculation fears while Shin overcomes his shot anxiety
- Ep. 29 · Mao-chan Acquires New Vocabulary While Friends Begin Speaking
- Ep. 30 · Honoka avoids Shin causing awkwardness while Mao-chan attempts to reconcile her parents
- Ep. 31 · Irritated Karin-chan
- Ep. 32 · Shiori discovers the hidden side of Rai-chan despite his obedient reputation.
- Ep. 33 · Mao-chan creates a heartfelt craft project for Honoka despite an accident.
- Ep. 34 · Mao-chan develops a strong fascination with remote controls and other button-operated electronics.
- Ep. 35 · The devil children struggle to interact with a mysterious new creature they encounter.