18 Year Old Hwa-jin's Crazy Sex(2020)

Original title: 18 출사녀 화진의 미친 섹스

Whenever she sees a messy kitchen, she calls her childhood friend Min-soo. Min-soo, complains in words but still brings side dishes to Seo-yeon. They're friends, but sex partners. Seo-yeon's relationship with Min-soo from their young age is natural. Min-soo is worried about Seo-yeon. He is jealous of the relationship between his younger friend Yeong-cheol and Seo-yeon.