The series is based on a visual novel, and follows protagonist Nagase Junichi, who attends a prestigious high-school. Due to a rebellious and sometimes violent past in middle-school, Junichi has the nickname Geno Killer (and the reputation to go with it), and this reputation helps him save Katagiri Yuuhi from some trouble.

She transfers into his school a few days later, and Junichi ends up kissing her due to a misunderstanding. It gets better, however, when the two discover that they are betrothed, something arranged by their parents. Their relationship is a bit volatile - because of that misunderstanding - and their parents order them to stay together. If there was no improvement in the relationship between them, the engagement would be cancelled.

Known character birthdays