Kao dake yoi Classmate ga Yatara to Guigui Kuru Yuri no Hanashi

Synopsis:

Because both Ritsu Kaido and her lover belong to the popular crowd, they are dating. She was celebrating her one-year anniversary with her partner on a summer day when her classmate Tsuzuri Yarai noticed them ready to kiss and stopped them. The plot is around a typical high school student who develops feelings for a friendly, gregarious, outgoing, and attractive girl.