BTS 4th Muster Happy Ever After. Word Search Puzzle Solver. BTS 4th Muster Happy Ever After word Search Puzzle Game. Find words related to movie actors, actresses, and genres. Word Search Puzzle Solver. BTS 4th Muster: Happy Ever After was BTS's 4th Muster fan club event. It took place from January 13 2018 to January 14 2018 in Seoul South Korea. This includes identifying and searching for words that are related to : kook, Park Ji, Kim Seok, jin, gi, Jeon Jung, seok, Jung Ho, Min Yoon, min, Kim Nam, joon, hyung, Kim Tae .