HYPERTOUGHNESS
So : Vocal
Minami : Vocal, Keyboard
Sxun : Guitar, Vocal, Chorus (Keep the Heat and Fire Yourself Up , Treasure in Your Handsのみ)
Taiki : Guitar, Vocal, Chorus
Tomonori : Drums
Kei : Bass Guitar (Keep the Heat and Fire Yourself Up , Treasure in Your Hands , The Gong of Knockoutのみ)
Tetsuya : Bass Guitar, Chorus (Keep the Heat and Fire Yourself Up , Treasure in Your Hands , The Gong of Knockout以外)