Song Woo-yeon, an ordinary high school girl with low self-esteem. While meeting friends, she accidentally becomes a drawing model and gets invited to the mysterious sketching club ‘Spirit Fingers’.

Worried that Ki-jung might tell Seon-ho about her embarrassing moment, Woo-yeon desperately avoids him, and Ki-jung finds her behavior unacceptable. Meanwhile, Seon-ho, who likes Green as a woman rather than a friend, is hurt by her attitude of treating him only as a friend.

Ki-jung realized that Woo-yeon liked Seon-ho. She was angry about it, but she herself was confused as to why she was angry.

Ki-jung unconsciously confessed his feelings for Woo-yeon. Woo-yeon couldn't believe Ki-jung liked her, while Ki-jung, now aware of his own feelings, found her reaction unbearably cute.

Seonho, whose long-suppressed feelings for Green finally erupt, declares he will no longer be just a friend to her. But Green, afraid of losing her precious friend, avoids his advances. Meanwhile, Ki-jung and Woo-yeon grow closer.

After Seonho's confession, the relationship between Seonho and Geurin has become intensely awkward. Geurin finds this situation unbearably painful. Woo-yeon, who hates feeling diminished when compared to others while with Ki-jeong, declares she absolutely cannot like him.

Sungho's bombshell announcement that he's about to enlist in the military sends Green's heart reeling, her mind completely filled with thoughts of him. Meanwhile, after the kissing incident, Kijeong insists he'll take responsibility for Woo-yeon, constantly talking about it.

Ye-rim, who came to the ‘Spirit Fingers’ gathering by chance. Seeing Ki-jung and Ye-rim's affectionate couple poses, Woo-yeon's heart is nothing but troubled. But Ki-jung, unaware of her true feelings, finds Woo-yeon's indifference unfair.

Uyeon and Gijeong finally confirm their feelings for each other. Having started their relationship with such difficulty, Gijeong finds every moment spent with Uyeon pure happiness.

After hearing Woo-dol's words, Ki-jung resolves to become a boyfriend Woo-yeon won't be ashamed of. Just then, he receives a casting offer from an entertainment agency and accepts it.

Wooyeon feels jealous of Kijung, who shines so brightly without effort, a stark contrast to herself. He hates and loathes himself for this, yet finds Kijung uncomfortable, so he avoids her. To make matters worse, Wooyeon's mother catches him attending a Spirit Fingers meeting, and he's grounded. Meanwhile, Seonho and Green struggle to open up to each other, and misunderstandings mount...

Woo-dol's runaway leaves Woo-yeon's house in chaos. Ki-jeong rescues Woo-dol and Bong-gu from near-critical injury, and Woo-yeon's family and Ki-jeong meet at the hospital. Meanwhile, Green heads to see his first love, Heo Je-ro, to resolve their marriage... What will be the outcome of Woo-yeon and Ki-jeong's love? Will Seon-ho and Green have a happy ending? This is the final story of young people, each with their own struggles to find their own unique identity, each with their own worries!