They were originally two couples, one was a 17-year-old high school student and the other was a successful white-collar worker. But they couldn't find the sweetness of love between each other, so one day, the boy, who was depressed after quarreling with the girl, entered the bar... While the girl wandered on the sparsely traveled road late at night. Boy meets man, girl meets woman. The fire of love was ignited the moment their eyes met, and the boy fell in love with the feeling of being cared for by his older lover, the only person he could trust who could hold him in his arms and make him act like a baby. The woman becomes the person the girl swears to protect her whole life. This is how this gender-ignoring love begins...