200 A price that one must pay

Climbing the tree with small legs is rather difficult. He manages to get into the treehouse. Lying on his back, he opens his mouth wide to breathe. He needs to work out. Before that, he needs to eat a lot and grow up faster. When he catches his breath, he looks around the treehouse. It's full of books. He checks the titles. Most of these books are on strategy and philosophy. He stands on his toes to reach the old photo frame on lying on the pile of the books.

In the picture, the man is carrying a toddler in his arms. The toddler has grey eyes and a bright smile in the picture. With one glance, Yuta can tell that the toddler is not Yuki. Why? It's his intuition. The smile is too bright. The eyes are too naive. Maybe a toddler is supposed to be like that, but he can't imagine her in such a manner. Even at her current age, there's sharp intelligence in her eyes. She's only six, but she's not like the average kids. If it's not her, who is this toddler? How old is this photo?