Toraware Hanahime no Shiawase na Gosan

Princess Loutier of the Kingdom of Florella, Lou, was called the "Flower Princess" for she had a magical power to make flowers bloom through her song. It was a power that royals of Florella possess, but hers was especially powerful. That is why she was always told not to use her power... It was too powerful that once she harmed someone when she was little. Lou didn't know about love, but she felt happy when Prince Raynaud of the allied kingdom asked her to marry him. However, on the day of the wedding, the Olgan Empire invaded Florella... Lou was captured by Prince Julius, a mysterious masked prince. Lou marries Prince Julius. She wants to hate him... but there is something soft in his heart that she can't ignore. Is this first love? (Source: Kadokawa)