So-hee was forced to start taking private lessons because of her mother. Rather than studying, she starts flirting with her tutor, Hyeon-goo. So-hee tells about her tutor to her friend, Mi-na. Mi-na shows interest in So-hee's tutor, so she tells her she wants to meet him. In exchange, she agrees to introduce So-hee to her boyfriend, Seung-mo. Then one day, Mi-na gets a good idea and calls So-hee and Hyeon-goo to start a 2-on-1 special class.

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