It tells a teen drama depicting the concerns of students at Korea Arts High School (Han Arts High School) who are desperate to find pink love in a world where popularity means rank and not receiving hearts makes you a loser. . An unfamiliar but bolder and more colorful story will unfold centered around the students, including their class, desires, love, and growth.

Already talented and famous KPOP stars are recombined to form the ultimate new girl group like puzzle pieces. Each competition is expected to bring fresh musical resonance and lively performances.

A boy falls to his death at school, but Ok Chan-mi does not believe that her twin brother, Park Won-seok, committed suicide. Chan-mi transfers to her brother's school, Yongtan High, and meets Ji Soo-heon, who witnessed her brother's death. A "hero," who avenges bullied students, appears at Yongtan High. Chan-mi speculates that it may be connected to her brother and starts looking for this hero.

The sweet and bitter campus life of those who want to protect love and friendship even in the stark college life, where romance is nowhere because of the cancellation of OT and MT begins!

Baek Ho-rang is a high school student. Due to her pretty appearance, she is popular on social media and at her school. Yet, Baek Ho-rang only has one friend, due to her condescending personality. Baek Ho-rang encounters a problem. She learns that someone is trying to unveil her secret. To find that anonymous person, Baek Ho-rang joins her high school's broadcasting club. Go Eun-taek is the chief of the broadcasting club. He is a perfectionist and respected by the club members.

A musical battle between 6 trending girl group acts, in order to "determine the real number one" when all 6 release their songs at the same time.