Sex Is Zero

After completing mandatory two-year military service, Eun-shik transfers to National University. He shares a cramped dorm with three incoming freshmen, setting a bustling campus backdrop. He begins earnest, awkward efforts to win over his junior Eun-hyo, whose presence unsettles him.

From their initial meeting, Eun-hyo disrupts his carefully calculated nerves. He stares and fumbles, while she teases him with a provocative, taunting display that lingers in his mind. The spark begins a pattern of clumsy, well-meaning gestures.

Eun-hyo becomes involved with Sang-ok, a widely admired student whose flashy confidence attracts her. The relationship introduces a new dynamic into Eun-shik's quiet crush, intensifying campus intrigue. Eun-shik's feelings become more complicated as she spends time with him.

Sang-ok spends a night with Eun-hyo, and she discovers she is pregnant. The revelation brings shock and a sense of gravity to both, shifting the stakes of their relationships. Eun-hyo's plans for her future become tangled in fear and uncertainty.

Sang-ok's spoiled attitude comes to the fore as he offers money to terminate the pregnancy and shows little responsibility. Eun-hyo feels betrayed by the man she trusted, deepening her sense of isolation. The choice about abortion now dominates her life.

Eun-hyo seeks support from a clinic, and Eun-shik steps in to accompany her. He initially misreads the situation as a date, but his resolve to stand by her through the procedure remains. The moment marks a turning point in his feelings and in their bond.

The abortion takes place with Eun-shik by her side, offering quiet, practical support. He cooks meals and tends to her post-operative fever as she processes the painful experience. Their companionship deepens into a care-based closeness.

In the days after, Eun-hyo mourns the breakup with Sang-ok while Eun-shik remains a steady presence. He helps her cope with loss and confusion, listening more than speaking. The bond between them shifts from awkward care to mutual reliance.

With the national aerobic competition approaching, Eun-hyo fights fatigue and heartbreak to prepare. She channels determination into a performance that blends technical skill with emotional depth. The strain reveals her resolve to excel despite personal turmoil.

Eun-hyo steps onto the stage with precision and emotional intensity. The crowd and her own ache sharpen her focus as she delivers a technically proficient routine. The moment becomes a turning point, illustrating resilience amid inner pain.

After her routine, Eun-hyo collapses into a restroom, crying and facing a visceral reminder of the abortion. The moment underscores the lasting weight of her decisions. The emotional and physical strain exposes the fragility underneath her steadfast performance.

Eun-shik discovers Eun-hyo missing and acts quickly to get her medical care. He ensures she receives attention and support, reinforcing the bond between them. The ordeal reframes their relationship through care and urgency.

Eun-shik tracks down Sang-ok at a post-competition celebration and confronts him with the truth of Eun-hyo’s tragedy. The confrontation ends with a decisive punch, signaling how deeply the events have affected him. The moment crystallizes the consequences of their choices.

Eun-hyo is discharged from the hospital, and she asks whether Eun-shik's feelings remain. The film leaves their future open, rooted in the connection formed through hardship, care, and complex love. The story closes with a note of tentative hope amid unresolved tensions.