BUT / Aishou (愛証 / Love Proof) is singer-songwriter Koda Kumi's 35th single and was released on March 14, 2007.
BUT / Aishou (BUT/愛証 "BUT/Proof of Love") adalah singel ke-35 karya penyanyi-penulis lagu Koda Kumi dan dirilis pada 14 Maret 2007.