He liked her noisy personality and how she could fill the most chatty corners of his heart with sunshine. If he is "concave", then the "convex" must be her. What he wants is her cry-loving and noisy temperament. He can't help but love her when she cries, and he can't stop loving her when she laughs. How could she be so lively and willing to let go of life? No matter what means are used, as long as she is here, everything can be said easily. He is her happiness.