I am looking for a manga where the main character doesn't know that they're beautiful (on the inside), and they're kind of underappreciated.

Koi Dano Ai Dano: This is the best example. She thinks she knows all of her ability, but she is actually much more than what she thinks she is. However, she is very appreciated by those few friends she has. I want something where nobody really know how beautiful this character is, and the beauty of this character is kind of subtle.