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In school, Yukina is a cold and distant girl; Shigure is the most perfect, good-looking guy. But the two of them have a secret, and their extraordinary love affair is about to start! Yukina, under the pen name 'Yupina', is actually a popular cell phone novelist. When she discovers Shigure's devious womanising ways, she blackmails him to complete daring 'missions of love' for her to write about. Will these missions give them an opportunity to fall in love with each other?