Yooncheol, a 36-year-old “goose dad” living alone while his wife and daughter study abroad, has endured two years of solitude—but what’s truly driving him mad are the relentless moans coming from the apartment next door. After months of tortured nights, he finally loses it and bangs on his neighbor’s door mid-climax. Bad idea. Seunghoon, a bold and mischievous 24-year-old college athlete, isn’t the least bit sorry—in fact, he’s now hell-bent on teasing the uptight older man even more.