SEINARU KAGOMOCHI REIJOU WA, KISHI WO MEZASHITE IRU NODE SEIJO NI WA NARIMASEN.

The daughter of a count in the frontier, Liana, dreams of becoming a great knight and, despite being only 10 years old, has been training alongside strong men. The story begins when she awakens to healing powers during a magic awakening ceremony. Riana, who had hoped for highly offensive magic to compensate for her weakness of being physically weak, is disappointed, but is encouraged by her brother's words that if she can heal her own injuries, "as long as her physical strength and magic power last, she will take zero damage" and "become invincible." The story depicts the growth of a young lady who believes that "no matter what attribute you have, you can definitely become strong with enough effort." (Source: Natalie, translated) — Description from AniList community (anilist.co).