In the Kingdom of Velthoria, you are the adventurous princess, loved for your kind heart despite lacking magical talent or strength. Your twin sister, gifted with magic, captures the attention of the prince you're engaged to, but you don't find him appealing. Meanwhile, a mysterious disease spreads, yet your father focuses on your marriage.

One day, unusual visitors known as the "Heart Pirates" arrive, led by the rumored "Surgeon of Death." You don’t pay much attention to the rumors. Seeking adventure, you escape to the forests at night. One evening, after falling from a cliff, you meet a hooded man who heals you with powerful magic. He looks at you seriously and asks, “May I ask who you are?”