Baek Seongchan is a walking red flag. With his bleached blonde hair, rotating fleet of luxury cars, and drop-dead gorgeous looks, he lives at the center of the campus rumor mill. Everyone whispers about his wild lifestyle, but Yena couldn’t care less about the gossip. She just wants to check a very specific item off her bucket list: losing her virginity. When she asks him to sleep with her just because he’s the best-looking guy around, she flips his world upside down. Seongchan is used to girls chasing him for romance, but he’s never met anyone quite as deadpan and straightforward as Yena. The game of seduction is officially on, and things are about to get anything but sober.

Beatriz is a duchess with a well-earned reputation for a deviant sex life. Well, she used to be a duchess. When she’s stabbed to death, she wakes up as Jae-young, an ordinary college student in modern times. With a whole new world at her disposal, Beatriz decides to enjoy herself. And there is so much to enjoy: modern technology, education she used to be barred from, and plenty of sex. As Jae-young, she’s going to conquer not only her new life, but also as many men and women as she wants.

Joo Seo-ah and Nam Dohyeon have been inseparable friends since middle school, sharing a bond that always felt like equal ground. However, following the implementation of the new age unification law, a technicality shifts their dynamic: Dohyeon is officially younger than Seo-ah. Heartbroken by a recent breakup and nursing a specific craving for the comfort of a firm, youthful younger man to spite her ex, Seo-ah decides to exploit this sudden age gap. She turns to Dohyeon, whose birthday falls just months after hers, and issues a playful yet daring challenge. “Hey, Nam Dohyeon. Call me Noona,” she demands. To her surprise, Dohyeon actually stammers it out, looking flustered and endearingly shy. Seeing him blush makes Seo-ah’s heart skip a beat; she suddenly finds him dangerously cute. Panicked, she realizes she’s crossing a line she can’t uncross. If he starts looking this adorable, she’s in serious trouble. What on earth is she supposed to do now?

Fresh out of the military and eager for a fresh start, Jiwoo returns to university, ready to slip back into the rhythm of normal campus life. His plans hit a sudden, unavoidable roadblock when he is forced to enroll in a course taught by Professor Ha-Yeong. Jiwoo absolutely dreads the prospect; he carries a deep-seated resentment toward her, stemming from a painful past where he was subjected to her blatant, unfair treatment. Forced to grit his teeth and endure her lectures, he prepares for a grueling semester of academic power games. However, the dynamic changes entirely when Jiwoo makes a startling discovery: he accidentally stumbles upon a secret, private account managed by Ha-Yeong. Behind the facade of the strict, demanding educator lies a completely different personality, and as Jiwoo peers into her hidden world, he finds his perception of his antagonist crumbling and his intrigue growing.

Perfect grades, perfect face, and an iron wall that no man can climb. Taeyeong is the campus Ice Queen, and Namjoo is just another guy stuck in the friend zone. But when he discovers Taeyeong’s deepest secret, a hidden masochistic streak, the power dynamic shifts. The Ice Queen doesn’t want a prince, she wants someone who knows how to pull her strings. Is Namjoo ready to stop being the “nice guy” and give her exactly what she secretly craves?

Eunju is a timid, slightly gloomy twenty-year-old with a secret she can never tell anyone. Whenever she holds hands with a man, her body reacts far more intensely than it should. Her quiet life takes a sharp turn when her sunbae Hyeyeong, a self-proclaimed expert in “adult matters,” discovers Eunju’s secret. From that moment on, Hyeyoung decides to take Eunju under her wing, and the two embark into a wild world neither of them came prepared for.

Kwon Heemang is a jobless recluse living a shut-in lifestyle without a single friend to her name. Her mundane existence takes a supernatural turn after a freak accident grants her the ability to see ghosts, leading to a haunting encounter with Kim Sarang. The lingering spirit strikes a deal: she will leave Heemang alone only after fulfilling her final wish. Sarang died just one month into her first relationship, never having the chance to truly experience intimacy with her boyfriend. Before Heemang can protest, Sarang possesses her body and tracks down her ex, Choi Taemin, a popular, younger student celebrating his return to college after military service. In a bold, possessed frenzy, Heemang catches Taemin off guard with an intense kiss in front of everyone. Shaken and humiliated once the possession lifts, Heemang flees the scene. However, Taemin, who secretly admires assertive older women, finds himself completely smitten by the mysterious “crazy woman” who stole his heart.

A long-awaited getaway with childhood friends takes a dangerous turn when Yu Seol-ah wakes in the dark to a touch she shouldn’t want, only to realize it belongs to Lee Taegeon, her best friend’s boyfriend. Caught between sleep and reality, her body reacts before her reason can catch up, blurring lines she’s spent ten years respecting. One forbidden moment is all it takes to threaten their friendship, their trust, and perhaps…to give her everything she’s ever wanted.

Because of a difficult family background, Jiwu enters college later than most of her peers. Quiet and reserved, she keeps to the edges of campus life, always feeling one step out of sync with everyone else. There is one person she cannot help noticing, Wuyeon, a boy who seems to shine wherever he goes. He stands at the center of every group, laughing easily, drawing people in without effort. Compared to him, Jiwu feels invisible, and so she hides her feelings, nursing a silent crush she believes will never reach him. To Jiwu, Wuyeon appears flawless, someone untouched by hardship or pain. But one rainy day, that illusion shatters. Jiwu stumbles upon Wuyeon standing alone in the downpour, tears mixing with rain as he cries with heartbreaking beauty. In that moment, Jiwu realizes that even the brightest people carry unseen scars. And perhaps her quiet presence could become a place of comfort for him.

20-year-old Choa ends a relationship after discovering her boyfriend mocking her for being bad in bed. Soon after, she learns her childhood friend and tutor, Seunghyeon, was dumped for the same reason. They decide to “study” together to rebuild their confidence, but these weekly “lessons” soon turn into something far hotter, and as bodies and boundaries blur, they must decide whether this chemistry stays in the bedroom or becomes something real.