Mizuho Nishino, a second-year high school student, lost her mother at a young age and has grown up supporting each other with her father. She lives in a residential area called Koikahama Highland and is bound by family-like ties with four boys of the same age who have been her childhood friends for over ten years. They all attend the same high school. Aspiring to become a manga artist, she continually works to hone her talents, even going so far as to submit her work to publishers.