Kou Kimahara is an ordinary high school boy who shares a class with Sakurazaki Nako, a popular JK idol. Even though they don't know each other at all, Nako suddenly approaches Kou one day, asking him, "Hey, you've got free time, right? Want to go to the arcade after school?" Nako, unfamiliar with typical after-school activities, wants Kou to show her how to enjoy her free time after school, having seen him freely do so every day. Through arcades, restaurants, and other shared moments, their time together becomes something precious… "Can I call you tonight?" "Pat my head like I'm a good girl." "I want to always feel Himahara-kun with me." A heart-pounding romantic comedy unfolds, as an immensely popular idol and a high school boy share their daily life!