Mystery is the second single off Beast's debut mini album Beast is the B2ST. The song peaked at #23 and sold around 1,371,314 units. Their debut mini ended up selling more than expected for a rookie group at the time, selling 20,000 more copies than originally expected.
expose
10: RafaelBuzz
9: jongshic
8: Kyle-x, Andre, superben, Hugamari
7: Haus-Of_Mck, MINKI
6: Rominho., Tim£, Sanjja
5: Nathan’s Nicely, Callum, Kkamjong, Ponyo, SummerTime, Miss Korea