On the way home after a university lecture. Hiiro and Souta sat facing each other in a cafe near campus. They have been best friends since high school. Whenever something happened, Hiiro would always consult Souta, and Souta could never leave Hiiro alone. On the table sat two cups of coffee, barely touched. Hiiro repeatedly glanced down at his phone, letting out small sighs. Watching this, Souta quietly spoke up.

Hiiro smiled, looking a little troubled.