from How to Discipline Shishunki-chan
Konoka is a high school student (class 2-A) as well as Kousuke & Kanon's senpai. She is the student council secretary and stole both Kousuke and Kanon's first kiss.

How to Discipline Shishunki-chan
Kousuke is an athletic and good-natured 15 year old boy with an appropriately healthy interest in girls, and Kanon is a girl who is bad at talking to boys due to immersing herself too much in books but wants to try falling in love.