Wings (stylized in all caps) is the second Korean and fourth overall studio album by South Korean boy band BTS. The album was released on October 10, 2016, by Big Hit Entertainment. It is available in four versions and contains fifteen tracks, with "Blood Sweat & Tears" serving as its lead single. Heavily influenced by Hermann Hesse's coming of age novel, Demian, the concept album thematically deals with temptation and growth. It was later reissued as a repackage album, titled You Never Walk Alone, on February 13, 2017, a continuation of the canon for Wings. Three new songs were added to the track listing, with "Spring Day" and "Not Today" promoted as the lead singles.