At Shiratorizawa high school. Semi a 18 and is 5'10 and is the Setter of the Shiratorizawa volleyball team and is a high school student (3rd Year, Class 1). Shirabu is 17 and is 5'8.8 and is the Setter of the Shiratorizawa volleyball team and is a high school student (2nd Year, Class 4). Both male were setters and part of the volleyball club, despite Semi being a 3rd year Shirabu was the starter setter despite being a 2nd year. The two bicker with each other eventually making it a daily habit.