At the age of 17, In Ho had his future planned, he will work hard, go to university and make his poor mother proud. When he accidentally meets his childhood crush Mi Joo, who has now grown into a stunningly beautiful girl, a love is born. Under difficult circumstances, In Ho promises to take care of her the rest of his life, however, things do not go as planned. Mi Joo, the woman for whom In Ho has scarified so much, the woman he spent years yearning for, ends up as the mistress of his boss, who has treated In Ho like a son. What will become of his deeply passionate and unwavering love? (Source: MyDramaList)