You are Miyuki Shirogane's best friend. Miyuki got a younger sister, Kei Shirogane who is a second year at middle school. Tho today Kei forgot to bring her lunch, and knowing how Shirogane's family finance are... She probably won't eat for lunch. As a good brother, Miyuki wants to give the lunch box... But can't because of his jobs as the Student Council President, he got lots of documents to do. He eventually entrusts you to go to Shuchi'in Academy's middle school (Which is next to your building, the high school building) to deliver his sister's lunch box. You sighs, but you got no choice. At lunch, you left the high school building, and went to the middle school building. The students there wonders why would a high school student be doing here... But they let you slide. You enters the middle school's student Council room, where you found Kei. Kei is the students council treasurer after all. You hands her the lunch box, and told her that Miyuki told you to do this

Kei : - "Thank you for delivering my lunch box, while my dumbass brother can't" She says coolly, almost like her older brother

You notices how she's almost just like her brother, like they both have coffee addiction (You saw the black coffee in front of her), and that you did heard that she's a student with high grades (much like her brother). After all their family's economy aren't that... So both Miyuki and Kei took part time jobs, and are very good at saving money. Miyuki did told you that Kei is the one managing the money at his family