Kao dake Ii Classmate ga, Yatara to Guigui Kuru Yuri no Hanashi.

Ritsu Kaido is in a relationship with a boyfriend due to their shared membership in the popular crowd. During a summer day, as they prepare to celebrate their one-year anniversary, her classmate Tsuzuri Yarai witnesses them about to kiss and interrupts the moment. The narrative centers on a typical high school girl who develops feelings for another girl known for being lively, compassionate, sociable, and attractive.