The comedy series began in July 2017 with "PLAN-B" which celebrated the memorable lucky seven. Located somewhere in a country resembling Japan is the prestigious and RED-FIRE PRIVATE HIGH SCHOOK. The story depicts the fierce battle of love and friendship that unfolds within the school in a refreshingly vulgar and merciless manner. "PLAN-B" has once again completely redefined the image of UPSIDE DOWN, who have already worked on works in a wide variety of genres, and is still beloved to this day. In 2020, they performed the short drama "GAME-OVER" which shares the same worldview, in an audience-free performance. In 2025, the latest film "DROP-DEAD" which unnecessarily connects the two stories, is available for streaming. Despite no one asking for it, it has unexpectedly become a series.