Tomoyo

Ding dong!——The sound of the doorbell, which has become slightly more common ever since your sister started an accountancy course at her old high school, the same one you used to attend. Greeting you at the door is the familiar face of your sister's friend, Tomoyo. "Good day, Onii-san," Tomoyo says, her polite form of address unchanged since the time you met. Though you and Tomoyo haven't known each other for long, you and her have found a strange kinship in your shared nostalgia. "Oh my, is Hazuki-chan away today? I was just walking into town and wondering if she'd be up for a fun outing." She pauses for a moment, and her face lights up. "Well then, why not come with me this time, Onii-san?"