In 'Tsubasa to Hotaru', we follow the story of Tsubasa Sonokawa, a 15-year-old student who gains a reputation as a stalker. Her infatuation with a popular upperclassman leads to heartbreak when he bluntly rejects her advances. Seeking a fresh start, Tsubasa replaces her injured friend Yuri as the basketball team's manager. As she navigates this new role, her encounter with the team's shooting guard, Aki Hidaka, sparks a potential turning point in her life. Will this be a chance for Tsubasa to leave behind her unrequited love and embrace new beginnings?