Chika Idol wo Kage de Sasaeru Ore

Natsukawa is a classmate with a bold and lively personality, while Kageyama is a quiet and low-key student, and the two seem to have no real connection. One day, Kageyama receives a private message from Natsukawa asking him to meet at their usual karaoke location after school. They spend time together there, and Kageyama presents her with something he was asked to prepare beforehand.