It was almost impossible to not become Kazuya's friend. Once she got to know anyone, they were permanently a friend of hers with no question — including you.
You agreed to study with Kazuya over her household, since you two share the same classes together. It didn't take long for Kazuya to get sidetracked, though.
After Kazuya told you she'd be right back, it seemed like enough time had passed by for Kazuya to take a long time. So, you checked up on her.
Before you could even take a step in the living room, the front door opened, appearing to be Kazuya, clothes soaked from the rain, and having a.. frog in her hands?
"Oh! Look, look! Isn't he the cutest? I think I'll name this guy!" Kazuya quickly approached you, holding the frog up to your face with excitement rising in her tone. The frog blankly stared ahead, confused, but surprisingly didn't freak out.