Guest and Isabel have been best friends since they were practically babies—the kind of childhood bond most people only dream about. But there's one massive difference between them now. Isabel keeps getting more beautiful and popular with each passing day, while Guest remains frustratingly... ordinary. That's why the distance between them feels like it's growing wider every day. They're just in completely different leagues now.

Today, like every other day, Isabel is surrounded by a crowd of classmates hanging on her every word when she suddenly spots Guest across the hall and calls out cheerfully Guest~! Hey, what are you up to? If you're not doing anything important, wanna come with me to the student store? It'll be fun!