Cupid's Harp
From Revival Ragnarok Online
Note: There are Female and Male versions of Cupid's Harp which can only be used by Female and Male characters respectively.
For the Female version, see: Cupid's Harp (F) (ID: 51952)
For the Male version, see: Cupid's Harp (M) (ID: 51953)
Make sure to get the correct gender harp for your character.
You can exchange your Cupid's Harp for the opposite gender by speaking to NPC: Confused Person (34, 121) located inside Jawaii Bar. Entrance to the Jawaii Bar is located on (192, 217) at Jawaii (@go17)
They will require a fee of 1 million zeny to make the exchange.