A Wife You Raise from Childhood Is the Better Choice

After transmigrating to the Wind Continent, I discovered that I was a useless weakling who had to be protected by my younger sister at every turn. When I was bullied at school, my sister shielded me with her own body and saved me time and again. She even entered the brutal Spear of Light Arena, fought fiercely, and won the championship, earning me the Spear of Light. From then on, I swore to protect my sister with my life, and wanted to marry her.