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!

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...

After hearing Woodol's words, Ki-jeong resolves to be a boyfriend Woo-yeon can be proud of. He then receives a casting offer from an entertainment agency, which Ki-jeong accepts. Meanwhile, Seon-ho's sudden appearance in Green's life puts him on edge, and a chill begins to settle between them. Meanwhile, Woo-yeon visits Ki-jeong's workplace and, upon seeing her unfamiliar appearance, feels a strange sensation...

Woo-yeon and Ki-jeong finally confirm their feelings for each other. Despite the difficulties of their relationship, Ki-jeong finds nothing but happiness in their time together. Meanwhile, Seon-ho and Green also confirm their feelings for each other and enjoy a sweet yet thrilling CC life. Just when they thought their future was all about happiness, an unexpected crisis looms...

Ye-rim follows Woo-yeon to a "Spirit Fingers" gathering. Woo-yeon is deeply disturbed by the sight of Ki-jeong and Ye-rim's affectionate couple pose. However, Ki-jeong, oblivious to Woo-yeon's true feelings, finds Woo-yeon unfazed. Then, Sera and Mirae, who happen to run into the triplets who have been bullying Woo-yeon, engage in a heated fight. Woo-yeon receives a call that the two are at the police station and rushes to them...

Seon-ho's bombshell announcement that he's about to enlist in the military shakes Green's heart, and thoughts of Seon-ho fill his mind. Meanwhile, Ki-jung goes around bragging about taking responsibility for Woo-yeon after the kissing incident, and Woo-yeon begins to open up to Ki-jung, who, despite his awkwardness, is always bright and caring. However, Ye-rim, trying to break up the relationship between Ki-jung and Woo-yeon, asks Woo-yeon to join the "Spirit Fingers" gathering.

After Seonho's confession, Seonho and Green's relationship becomes increasingly awkward. Green finds this situation incredibly distressing. Wooyeon, too, hates the feeling of being small and being compared to others around her when she's with Kijung, and declares she'll never love her. Meanwhile, Wooyeon, who studied hard to confidently attend the "Spirit Fingers" club, finally tells her mother when her grades improve, but she's severely scolded and heartbroken...

Seonho, whose secret feelings for Green have finally burst forth, declares that from now on, he will be a man, not just a friend. However, Green, fearful of losing his precious friend, avoids Seonho's feelings. Meanwhile, Kijung and Wooyeon are growing closer. The two schedule a date that isn't really a date, and on the day of the date, Wooyeon, who is waiting for Kijung, is quietly approached by the dark hand of Yerim, who has a crush on Kijung...

Ki-jung unconsciously confesses her feelings for Woo-yeon. Woo-yeon can't believe Ki-jung likes her, but Ki-jung, now aware of her feelings, finds Woo-yeon unbearably adorable. Meanwhile, seeing Woo-yeon brighten and become more handsome through Spirit Fingers, and even receiving a confession from Ki-jung, Mirae's self-esteem explodes, leading her to say something hurtful to Woo-yeon, and the two end up in a huge fight...

Ki-jung notices that Woo-yeon likes Seon-ho. He's furious, but he's also confused about why. Unaware of Ki-jung's true feelings, Woo-yeon fears Ki-jung will tell Seon-ho about her feelings, and misunderstands that Ki-jung is angry because she's worried that he, an ordinary person, will come between Seon-ho and Green, who seem like a perfect pair.

Worried that Ki-jung will tell Seon-ho about his embarrassing behavior, Woo-yeon desperately avoids him, and Ki-jung is displeased with Woo-yeon's behavior. Meanwhile, Seon-ho, who likes Green as a woman rather than a friend, is heartbroken by her friend-only attitude. Then, when Ki-jung's one-sided promise overlaps with his date with Seon-ho, Woo-yeon lies to Ki-jung and breaks his promise...

Song Woo-yeon, an ordinary high school student with low self-esteem, finds herself posing for a painting while out with friends. She's then invited to the mysterious croquis group "Spirit Fingers." Seduced by the handsome Seon-ho, Woo-yeon joins the group. However, there, she encounters Ki-jeong, the younger brother of fellow member Green, who witnessed her embarrassing behavior at the hands of a bully.