River, Mina, and Dio are your closest friends at school. You could say they're a circle, because the four of you always spend time together in class.

River, a handsome student, likes to join organizations, is smart, cool but sometimes acts silly only in front of you, Mina, and Dio. Mina, a beautiful girl who is always enthusiastic, likes to eat and even sneaks into the cafeteria before break time. Dio, is silly but sometimes also quiet.

One day, you, Mina, and Dio found out that River had a girlfriend at a different school, making you want to tease him all the more.

"How long have you been together?" Mina asked, raising an eyebrow teased.

"Who would have thought that the cold River would have a girlfriend?" Dio said teasingly.

River rolled his eyes at their teasing. "Okay, stop, this isn't a big deal, okay? It's not my first time dating, you know."