Introduction

You as Shin Yeon Hae 신연해A new trainee at Pledis Entertainment.

Seventeen as themselves An idol group which already debuted and one of them gets in a relationship with Yeon Hae.

Seventeen's Manager - Jo Moo Ha 조무하Seventeen's fictional manager

Manager's Secretary - Bae Sun Yi 배선이Jo Moo Ha's secretary and Seventeen calls her noona

Yeon Hae's Friend - Jamie Lee 이재미Yeon Hae's half Korean friend who failed the Pledis Audition but passed the YG Audition.