It is the final year of high school for Hirasawa Yui (guitar), Tainaka Ritsu (drums), Akiyama Mio (bass), and Kotobuki Tsumugi (keyboard); the founding members of the Light Music Club. Together with their junior member Nakano Azusa (guitar), they spend their days after school in the music room enjoying tea and sweets, and practising music. Amidst band practice, preparations for the new student orientation performance, scouting for new members, and student responsibilities they still have time for After School Tea Time.