The Saint Is Five, So I'll Just Be the Decorative Queen.

Summary

Since the Saint will arrive soon, I will never love you.” With these cold words from her future husband, King Yuri, Ederine resolves to quietly live her life as a mere ornamental queen. However, when the long-awaited Saint is finally summoned, the one who appears is… a terrified 5-year-old girl, abused and trembling with fear!? This wounded little child is gently cared for, cherished, and raised with endless love by Ederine and King Yuri. A warm, heart-healing fantasy about family affection and the growth of a beloved young girl begins!