Earlier this year, BTS singer V stepped up to croon a soothing track for his friend Park Seo Joon's popular Korean drama show Itaewon Class. The singer sang Sweet Night for the show and it went on to shatter several records. It seems like Taehyung's fellow BTS member Jin is prompted to follow his footsteps and sing a song for his friend Yoo Seung Ho's show Memorist. Until a few weeks ago, the ARMY wasn't even aware that BTS singer Jin was friends with actor Yoo Seung Ho.