Min-guk came to Japan to study Japanese and went to a language school. There, he meets the instructor Mao and falls in love with her ... Hyo Beom, who is attending the same lecture, and the head of the language school, who is smirking, are both busy chasing Mao. Min-guk, who truly loves her Mao, doesn't like the men around Mao, and eventually confesses her sincerity to her Mao. Mao also opens her heart to her Min-guk and the two become close enough to give her private tutoring... Her director offers Mao her vice-president position and covets her... Can Mao and her love bear fruit?