Takaga Shishaku Chakunan ni Koukina Hitotachi ga Guigui Kite Komaru @COMIC

A young man with no interest in status or achievement attends the Royal Academy, the largest school in the kingdom, where nobles and influential figures are common. Though he seems carefree and indifferent, he is actually an NPC blessed with strength and charisma. His presence draws the attention of the prince, the prince’s fiancée, and others, leading to frequent shifts in his circumstances. He interacts with various characters, unaware that the world is an RPG called "Real Fantasy." His lack of ambition and self-awareness leads to unexpected developments in this fantasy setting.