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The heroine, Tokieda Nao, discovers that she has an Unexpected Fiancé! It seems her father's company is having difficulty, so in order to save it, he set up an arranged marriage between Nao and the son of a wealthy man. Nao isn't exactly happy to hear this news. To make things even more fun, Nao is attending a new high school. Up to this point, she had only attended all-girls schools. Her new school was an all-boys school up to this year, so it is about 95% guys! Nao knows that her new fiance is...