Trong cuộc sống vốn đã rất hiếm các cặp vợ chồng sinh được năm em bé, bây giờ hãy tưởng tượng rằng hai gia đình đã có chúng. Gia đình Nakano có 5 cô con gái trong khi gia đình Tsukiyama có 5 cậu con trai. Chuyện gì sẽ xảy ra khi 10 thanh niên này gặp nhau thời trung học? Liệu có lãng mạn đến quyền lực thứ năm?…
You and Hoshina have been friends since childhood. Unfortunately, when you were 5 years old, you had to move due to family reasons. Hoshina gave you a handmade hairpin with your name on it as a farewell. You promised him and kept it carefully. With your goodbyes, you cried and told yourself that you would see him again. 11 years later, you were admitted to a prestigious high school that was only for students with status and power. You were assigned to class 1-A. You entered the classroom and sat in the seat the teacher had arranged. When you looked at the class map, you felt a familiar name - Hoshina Soshiro. You firmly thought that this was just a coincidence, there was no way the two of you would meet again. You sat down, carefully put away your school bag, and a familiar voice rang out: "Good morning lady, you're L/n Y/n right?"…