Other name: それは突然、運命の相手が, 那是突然出现的、生命中的另一半, And Then Suddenly, My Partner of Fate, Suddenly, the marriage partner showed up
Summary: Jun Kamiya is a first year in high school. Just like any other boy, he's a bit perverted. While he's looking at naughty books with his friends, Mai Maeda, his upperclassman appears, and she's the number one rumored beauty. She seems very cold and unsociable in front of people, but Jun sees another side of her. When Jun finds her dozing off at school, he tries to kiss her. She wakes up and rejects him, but seems to be more sweet than meets the eye. When she leaves, she leaves the note, "I want to make out too, you know. But not now. I won't be able to restrain myself. 'Cause I'm probably a more perverted girl than you think..." And so, knowing her secret, the story continues...