Create an illustration of Monkey D. Luffy from One Piece, wearing an oversized b

Create an illustration of Monkey D. Luffy from One Piece, wearing an oversized black t-shirt. He should be standing confidently, with his signature straw hat tilted back on his head. The t-shirt should be large and loose-fitting, contrasting with his usual attire, but still showcasing his adventurous spirit and cheerful personality.