Sister-in-law Without Underwear

A newlywed couple, Min-jeong and Hyeon-soo, are visited on their honeymoon by Hyeon-soo's younger brother, Kang-tae, triggering an unexpected and conflicted attraction in Min-jeong. As Min-jeong struggles to suppress her feelings and confides in her friend Na-hee, Na-hee simultaneously realizes that Kang-tae's affections are directed toward his sister-in-law.