Infiltrated Couple

Junho has been struggling since his wife passed away shortly after their marriage. Seeing Junho in such pain, Minjae feels sorry for him, and after much thought, introduces him to Sunyoung, the best friend of his girlfriend, Hye-in. However, as Sunyoung and Junho meet more frequently, Junho unexpectedly becomes closer to Hye-in instead, and Sunyoung reveals a surprising truth to Minjae…