Romance[]
Souta Hori[]
Yuuna and Souta are noted to be both friends and classmates. When asked by Shuu Iura if they are "just friends", she responds back with "obviously", noting that it's still 10 years too early for Souta to even understand what the latter meant by asking the question.
It is worth mentioning that Okuyama often goes over to the Hori household after school to play with Souta.
After the time skip, it's shown that both Souta and Yuuna are high school students and that they're also in love with each other. At first, Yuuna became very upset when she thought that he loved someone else but eventually came to a relief when he revealed that it was her, he loved. In the midst of the confession, they've stated that they both fell in love a long time ago.
Friends[]
Kyouko Hori[]
Okuyama looks up to Hori as an older sister where she thinks of her as kind, cute and good at cooking.
In addition, the two share a similar aesthetic when it comes to Hori's handmade stuffed animals.