4s4ki (pronounced ASAKI) is a new generation artist who is introducing new alternative pop music from Tokyo to the world. She is capable of writing, composing, and arranging music, as well as making tracks using DTM, and playing the piano on her own. The song has attracted a lot of attention from overseas, and has been selected as one of the official overseas official playlists on streaming services. In April 2021, she made her major label debut on Victor/Speedstar Records. She released her major debut album "Castle in Madness" in July of the same year. In August, she performed at Japanese outdoor festival, FUJI ROCK FESTIVAL'21.