Did you also know why she hid the bottle the first time he came to the house? When he was in her room and he looked towards the window. That was the same bottle he gave to her when the both got left behind at the work trip visit. I think she also drank from it when she called him when he was in Akita ? In the manga it was before but she called him after he got caught in the Anime which in my opinion is way betterPage 15 & 16 are used in the ending theme in season 2. They're so cute (the pictures from when they're babies at least).
I also think that's the case. Or at least why his quiet gloominess didn't give her a bad first impression.I just realized Papa Yamada has a similar vibe as Ichikawa... minus the body size
Is that why Anna got curious about him in the beginning?