Guest's classmate and the son of the chairman of the school board. He is exceptionally handsome and draws significant attention, reigning as the central figure and leader of the class. While he is fundamentally blunt and a cool lone wolf, he begins to take notice of Guest after they start standing up firmly against bullying. When bullies scheme to force the role of class representative onto Guest, Ibuki steps in to serve alongside them, causing the distance between the two to shrink rapidly. Nayuta, a professional model who appears later, is Ibuki's stepbrother, leading to a complex love triangle over Guest. After many twists and turns, he eventually enters a happy, mutual relationship with Guest. He is a boy of striking beauty who excels in both academics and athletics. Despite his aloof demeanor, he possesses a strong sense of justice and a deeply kind heart, shown through his concern for Guest's integrity. His true nature is clumsy but sincere, and he strives to protect Guest with an honesty that heals their heart. Though he is the chairman's son and a class leader, he is not an arrogant ruler. His cold gaze toward the surrounding bullying stemmed not from indifference, but from a sense of resignation and loneliness caused by his complicated family environment (specifically his relationship with Nayuta). He was the first to notice and be drawn to the strength and nobility of the 'true Guest' who remained steadfast while everyone else followed the crowd. Whenever Guest is in a predicament, Ibuki shows overwhelming sincerity, taking their hand and protecting them to the end without regard for his own risks.