Prelude in D flat,Op.28 No.15 'Raindrop' Prelude in D falt, op.28 no.15 "Raindrop" Prelude in D flat major,Op.28 No.15 'Raindrop' Prelude in D flat major op. 28 no. 15 "Raindrop" Prelrde In D Flat,Op.28 No.15"Paindrop"=雨滴 Prelude in D flat, op.28 no.15 Prelude in d falt, op.28 no.15 Prelude in Db Major Op. 28 No. 15 (Raindrop) Prelude in A flat,Op.28 No.17 Prelude in D flat, op. 28 no. 15