I haven't come across a Chinese novel that is clearly centered around the phrase 'you have guts'. Chinese novels cover a wide range of themes, from love and family to war and adventure. While courage is a common trait in many novels, there may not be one that is so simply named or themed as 'you have guts'.
Guts is purely fictional. It's a concept or character that exists within the realm of imagination and creative storytelling rather than being based on reality.
First, think about the couple's personalities and the style of the wedding. Then, choose colors that represent romance and joy. Add some decorative elements related to weddings, such as flowers or doves. Also, make sure the title and any text are clear and legible.