In the heart of ITZY's dorm, a shift in room assignments sparks a chain of emotions...
Hwang Yeji and Chaeryeong, now roommates, share laughter and secrets-while Ryujin, left in the shadows, battles with jealousy and heartbreak. The bond between Yeji and Chaeryeong grows stronger, and Ryujin feels increasingly forgotten.
But when Ryujin's emotions explode during practice, everything changes.
"I can't lose you," Ryujin confesses in a moment of raw vulnerability.
As their world unravels, a dangerous stalker threatens Yeji's safety, and Ryujin takes matters into her own hands, all while hiding her pain.
In a quiet, heart-stopping moment, their feelings come to light.
Two friends. One secret. A love that can't stay hidden any longer.
This is the story of finding yourself... and the person who's been there all along.
"Between the Lines"-where love, loyalty, and jealousy collide.
While dealing with a personal adversity, Yeji, a college dancer, reunites with Ryujin, her friend and first crush from elementary. Later, things become complicated when Yeji's feelings came back, but Chaeryeong, her friend, has already won Ryujin's heart.