"Danger in my Heart Season 2" continues the story of Koutaro Itikawa, a young boy with a sharp sense of dislike and a tendency towards introversion. His life is filled with dark fantasies of getting rid of his classmates. Koutaro finds solace in reading books with dark themes and studying human anatomy. Everything changes when he meets Anna Yamada - the first girl in school who awakens unexpected feelings in him. This closeness forces Koutaro and Anna to share their secrets and open up to each other, reshaping their perceptions of the world and themselves.