With a singular mission to eliminate Honeko Akabane, Arakuni Ibuki discovers that his childhood friend is in danger of assassination. Tasked with covertly safeguarding her throughout their time in Class 3-4 at Sosoji High School, Ibuki endeavors to ensure her safe graduation without her knowledge. As he delves into his role as a hidden protector, mysteries lurking within the class unravel before him. Enter a riveting tale of action, comedy, and school life as Ibuki embarks on this thrilling journey!