Dumped by her ex-boyfriend due to sexual incompatibility, Seoyun joins a dating reality show called "The Sleeping-First Clubhouse," where participants sleep together before starting a relationship. During a 7-day stay, she must find her true partner between instinct and love. Torn between Taeha, who follows his instincts; Jaemin, her sweet first love; and Dongjun, her selfish ex, Seoyun faces the desires, wounds, and obsessions disguised as love. Ultimately, she realizes the courage to make the right choice for herself.
