Kameda Kamerou, a typical second-year high school student, appears unremarkable on the surface, concealing his true emotions deep within. However, his world is turned upside down when his best friend, Kaerugawa Erutaka, garners attention for his altruistic deeds, drawing the interest of the school's elite circle led by the ambitious Raionji Raiou, a popular figure vying for the role of student council president. As Kaerugawa aligns himself with this influential group, Kameda grapples with feelings of envy and inadequacy. Will their friendship endure this test? The climax unfolds during the student council elections, marked by a showdown dubbed 'bone-to-bone collision'! Witness a transformative tale where shifting bones herald profound changes, capturing the trials and triumphs of a group of high school students navigating conflicts and personal growth amidst the backdrop of their rib-centric world.