based on the movie “How to Lose a Guy in 10 Days.” Park Chanyeol , a young advertising agent, has found a great contract to advertise diamonds, but the boss wants to give it to his colleagues who convince him that they would be better able to advertise a product aimed at women. Chanyeol declares that he, understands women better and makes a bet with the boss that he can make any girl fall for him within 10 days.