1 younger brother and 7 older brothers

Seven of us go to school together, and one of us works at a company. One of the seven is the homeroom teacher of the two youngest siblings. Character introduction: Jeon Jungkook (17 / He is the twin of Yeoju. He was born 5 minutes before Yeoju, so they go to the same school and grade.) Yeoju, 17 / (The youngest of 8 siblings.) Park Jimin, 18 / (He is the twin of Kim Taehyung.) Kim Taehyung, 18 / (Park Jimin is my twin, but I am the older brother because I am 1 minute younger.) Hoseok, 19 / (He i