After his dream, Do-hyeon struggles around Eun-ho just as handsome transfer student I-hyun arrives.

I-hyun grows closer to Eun-ho, leaving Do-hyeon jealous as Eun-ho suspects his friend likes someone.

On Do-hyeon’s birthday, an intimate moment with Eun-ho threatens to change their 19-year friendship forever.

After kissing Do-hyeon, Eun-ho avoids him, but distance only makes him notice his best friend even more.

After Do-hyeon confesses, Eun-ho must decide whether to protect their friendship or cross the line with him.

Eun-ho kisses Do-hyeon and they start dating, but becoming lovers feels strange after 19 years as friends.

As exams approach, Eun-ho and Do-hyeon grow more comfortable together while facing the end of high school.

At college, Do-hyeon draws attention from girls, leaving Eun-ho struggling to hide his growing jealousy.

After overcoming their struggles, Eun-ho and Do-hyeon finally face the feelings behind their 19-year bond.