H1-KEY release digital single "Unbelievable" November 13

H1-KEY's agency, Choi Creative Lab, announced that the group will release a new digital single, "Unbelievable", on music platforms at 6 PM KST on November 13. It is their first new song in eight months, following their fifth mini album, "LOVECHAPTER", released in March. That album's title track was "To. My First Love". In June, H1-KEY held their first solo fan meeting in Japan, "THE FIRST KEY".