Go eun ae just graduated from school and her teaching course , as she entered National Seoul School as her first career job , a teacher teaching younger students, she met her boss , Mr Jung jaehyun . National Seoul Schopl is the first school in the world to accept 7 to 17 yr old students. As Eun Ae gets too interact more with jaehyun she starts to feel her heart flutter . " is this love" was the question she thought to herself everyday after falling for him