[てつ] おねーちゃんと僕とヒミツの... (かなりちいさいほうでしょう) [英訳] [DL版] , [Tetsu] Onee-chan to Boku to Himitsu no... | The Secret Between My Sister and I... (Kanari Chiisai Hou Deshou) [English] [Black Paper] [Digital]