Former actor Mito Yusuke has spent years searching for the truth behind the mysterious death of his beloved wife, a teacher at the prestigious private boys’ school Mankai Academy. Believing her death is connected to an incident she had been investigating, Mito conceals his identity and infiltrates the school as a teacher.

The Boonboomger collaborates with popular YouTuber HIKAKIN on a shoot at a racing circuit that Taiya purchased. But when Princess Nicola Keydoor of planet Trickle who escaped from her home planet to Earth suddenly appeared, the Boonboomgers are now involved in a major incident that shakes the peace of planet Earth! This is Boonboomger's biggest mission yet!

A seemingly ordinary housewife living a double life as a notorious online vigilante must carry out a dangerous hit job after being blackmailed by a mysterious figure.