
Quick answer — sweet ARMS performed 5 anime themes, including "Date A Live" from Date A Live, "Hitohira" from Date A Live V, "I swear" from Date A Live III.
sweet ARMS performed the anime theme songs "Date A Live" (Date A Live), "Hitohira" (Date A Live V), "I swear" (Date A Live III), "S.O.S" (Date A Live IV), "Trust in you" (Date A Live II).
sweet ARMS's first listed anime theme is "Date A Live", the opening of Date A Live.