Tensho School is located in the 7th Ward of Thrive Central, where emphasis is put on extracurricular activities and all clubs participate in an annual fall singing contest. Having to delay the start of his school year due to his older sister's hospitalization, transfer student Saku Otonomiya finds himself struggling to adapt to his hectic new life. Balancing his part-time job and caring for his sister, he finds it difficult to make time to join a school club.