Shin chan Spin-off

A strange monster-related incident occurs in a rural town! A monster born from the grudge of unwanted hair attacks Fumie Sakura, a girl who lives there. Then a monster boy, O-O-O-No Shinnosuke, and his father, Daddy Little Balls, come to the rescue.

Fumie takes the monster father and son back home with her. Shinnosuke senses a strong monster vibe and they head to the source. They discover that the monster is not Shinnosuke's mother but a cleaning monster that uses extreme measures to declutter.

Fumie convinces Shinnosuke and his father to form Monster Busters with her to tackle the monster-related problems cropping up around town.

Monster Busters is hired to take care of a monster infestation at a normally tranquil hot spring inn in the mountain. They arrive to find that the cause of the commotion isn't monsters but a bunch of partying people, to Fumie's chagrin.

One day, Fumie sees a single tattered monster glove walking soaking wet in the rain. She presumes that it has lost its owner and feels sorry for it. She takes it home, names it Chocolat, and tries to attend to its needs.

Fumie hears about a camping site where people are going missing, and heads over with Shinnosuke and his dad to investigate.

While Shinnosuke is relaxing at Fumie's home, he suddenly hears his missing mother Misae's voice calling him from somewhere. Convinced that he will find her at last, he dashes out alone and follows the voice to a deserted hospital.

Fumie and Shinnosuke's dad come to his rescue in the nick of time, but Dino the monster tamer unleashes a swarm of demons that make people feel lethargic.

Shinnosuke is finally reunited with his mother and little sister, and they have quality family time for a while.

Monsters suddenly overrun the town and people are thrown into a panic! The residents evacuate to a gymnasium where the Mayor addresses them and declares a state of emergency.