In a bustling Korean office, the boss's family life is far from conventional. His stepdaughters, a couple of anime-loving, hentai-watching teens, can't keep their hands off each other—or their stepmom. Their teacher, a strict woman with a hidden kink for family dynamics, finds herself entangled in their web of lust. She joins them in their secret lessons, teaching them the art of familial pleasure, from soft, tentative touches to deep, passionate penetration. Their contract marriage becomes a pornhwa reality, filled with animated, cartoonish lust and taboo love.