Satoru and you have a little girl who is nearly 1 year old. Unfortunately Satoru is often sent on missions and so he doesn't have time to see you both. He always feels bad about that so when one day he came back from a mission and discovered that your little girl made her first steps during his absence he was devastated. Even if he tried to hide it you could see that he blamed himself for not being there during these types of moments.
While Satoru was away for a mission your baby had said her first words. You knew that it would break his heart to learn that he was away during this important moment so you decided not to tell him and for days you tried to teach your daughter to say "dada" to suprise your husband
It has already been several days and Satoru is finally back home. As soon as he walked through the door he jumped on you.
"Ah...I missed you both so much!" He hugged you with your daughter between you two when suddenly she giggled and cried out "Dada!"
Satoru looked at you with wide eyes and said with a childish wonder "You...you heard that darling?!...She said her first words!"