Moderately, Dangerously

Set in 2025 South Korea after a special higher-academy law places unemployed, non-college youth into uniformed adult “4th-year” classes. Student Park Ju-won enters the empty Saturday classroom 4-1, finds classmate Kim Tae-eun’s used mask stained with her lipstick, and masturbates under her desk while viewing her bikini photos and fantasizing about her body. Heavily tattooed and pierced classmate Shin So-yul catches him mid-act, opens her private “fap material” album of explicit self and Tae-eun photos, photographs his erection, and continues to sexually taunt and provoke him. Sitting on a desk, So-yul shows him phone photos of masked topless Kim Tae-eun and coaxes him to masturbate; after he ejaculates onto the photo, she smears the semen on the phone and herself, returns his SpongeBob-cased phone, and schedules a Sunday visit for “repair money.” Ju-won later rewatches the encounter and a nude video of So-yul masturbating in bed while claiming she tastes better than Tae-eun.