Kang Yu-ri is happy being invisible. As "The Producer" on Instagram, she can obsess over K-pop group Z-Verse from a distance.

Everything changes when Z-Verse's leader Jin enrolls in her college disguised as nerdy transfer student Park Tae-jun. He knows her secret fan account, and now he wants her help to live a normal life for one month.

She wanted a Normal Day. She got an idol sitting behind her.