"Alive" is a message song for friends and people who are living their lives to the fullest towards their dreams. It tells the story of how someone with no dreams or goals met friends who were living their lives to the fullest in the present, and a light shone on their life. The song is filled with the desire to ask themselves how they are living now as adults, the dreams and jokes they shared as students, and whether their futures are what they imagined, and to share the feelings they had back then once again. This song is a collaboration between Rio, the main vocalist of the music unit "WHITEBOX", which has over 1 million followers on SNS (700 million total views), Yumi, a singer-songwriter with a unique singing voice and overflowing talent, whose digital single "Koi no Oto" has been played over 1 million times on subscription services, and stb, who has also written songs for various major artists such as Kana Nishino, 48-kei GENERATIONS, from EXILE TRIBE, Kis-My-Ft2, and Seo Inguk from Korea as part of SOU by COZMIC CODE, and is an active artist himself. The emotional singing voices of the two are mixed together with a looming chorus, making it a grand and appealing song. The delicate beat track also expresses the lightness of running through youth. This is a message song for friends and people who are living their lives to the fullest towards their dreams.