Final grades, class rankings and complicated truths cause emotions to run high as Kitty takes a stand with her future at KISS hanging in the balance.

A jet-lagged Kitty can't wait to see Dae, but their long-awaited reunion goes awry due to dormitory complications and the fallout from a viral video.

A school trip gives Dae a chance to regain Kitty's trust as Yuri opens up about Juliana, Florian confides in Q, and Min Ho makes a relationship decision.

Dae experiences conflicting emotions over a sudden change of plans as Kitty deals with her own tangled feelings and an unfortunate new nickname.

With finals approaching, Kitty leans on her friends for extra help, but tempers flare at KISS and beyond amid bombshells, betrayals and blazing fights.

Tensions turn into revelations during a Saturday detention session after Kitty reluctantly agrees to help Yuri figure out what Principal Jina is hiding.

Kitty joins Q's outdoor club to connect with Dae away from school, but a clue about her mom soon sends her on a fact-finding — and matchmaking — mission.

With no plans for the Chuseok holiday, Kitty attempts to prepare a special feast for other students on campus with help from an unlikely source.

Drama erupts and romantic connections emerge at Min Ho's swanky party, where a determined Kitty intends to work through her feelings about Dae.

Yearning to feel closer to her late mother and surprise her long-distance boyfriend, Kitty sets her sights on attending a prestigious school in Seoul.

Determined to avoid romantic chaos and learn more about her mom, Kitty returns to Seoul. But with new roommates and unresolved crushes, it's complicated.

A wintry weekend at Min Ho's ski cabin turns into a WiFi-less nightmare when Kitty and the gang get snowed in — and shocking revelations come to light.

On the eve of the Cherry Blossom Ball, Kitty focuses on family while following a hunch about Stella. Yuri helps Dae prepare for his performance.

Season Finale: Dreams hang in the balance as Stella's concert plan comes together. With emotions running high, will Kitty reveal her feelings before the semester ends? Season Finale

As Min Ho and Yuri do damage control to fix fractured relationships, a friendly face from home pays Kitty a visit — and brings life-changing information.

Kitty pursues a new love interest, but a night of dancing spins into drama. A fierce competition emerges during class, and Q's track rival plays dirty.

During Seollal, Kitty and Praveena enlist Min Ho's help for a heist, Juliana confronts Yuri, and sparks fly from a bonding moment years in the making.

As suspicions about Stella grow, Kitty chases a lead to long-lost relatives as Yuri tries to make amends with Juliana. Another scandal rocks the school.