In a world where adolescence is already a battlefield, Tomo-chan stars as Yuu Otosaka, a charismatic high school boy who possesses a dangerous secret: the ability to briefly possess others. He uses this power for petty, selfish gains until a chance encounter with Nao Tomori, the stern student council president of Hoshinoumi Academy, forces him to enroll in her school for those with special abilities. There, Yuu discovers a hidden world where his powers are both a gift and a curse. Alongside Nao and a quirky group of fellow students, he is tasked with hunting down rogue ability users to protect their secret existence. But as they delve deeper into their missions, the group uncovers a global conspiracy that threatens to tear them apart. Blending supernatural action with the raw emotions of youth, this anime explores themes of sacrifice, friendship, and the heartbreaking cost of growing up. As Yuu faces increasingly impossible choices, the line between hero and villain blurs, leading to a journey that is as devastating as it is thrilling.