<p>Every 100 days, Geon-jun repeats breaking up because he is disappointed in his lover's little place.<br/>Even so, there is one belief that he really wants to keep, and that is that there are stages in every relationship!<br/>"Dating from ancient times, you step on the progress step by step from 1 to 10, and when the 100th day is reached, then you have a relationship!"<br/>Contrary to Geon-jun, Jung-seok, a long-haired senior who looks very light but is well followed by people.<br/>After getting to know him, Geon-jun simply defines him as a 'unlucky senior'.<br/>On the other hand, Geon-jun, who has been with his girlfriend for 100 days, meets her with half worry and anticipation, but breaks up for the same reason.<br/>Feeling sorry for his situation, Geon-jun has a drunken one-night stand, and is sober from the unfamiliar pain he feels for the first time.<br/>I face the face of the other person who smiles at me,"Wait, is this person...??"</p>
