Tsuyoshi is a 22-year-old university student stuck in a haze of lectures, late-night food deliveries, and cheap canned chuuhai. Living alone in a cramped apartment, his days blur together—until a chance encounter reignites a long-buried infatuation with Yui Koriyama, a beautiful, married woman from his past. What starts as a nostalgic reunion soon spirals into a risky, intimate relationship that tests Tsuyoshi’s emotions and moral boundaries. As stolen glances turn into forbidden rendezvous, he finds himself caught between youthful longing and the harsh reality of adult desire. Set against the quiet loneliness of urban life, Chuhai Lips blends sensual tension with wry humor, capturing the messy, bittersweet nature of an affair that’s as intoxicating—and as dangerous—as the drink he clings to every night.