The Selfish Romance summary:

"What about you? When you see me happily with another men."'Yu-min' and 'Hyeon-do' are ordinary people in their 30s. For some reason, they broke up with their respective lovers, but in reality, they have more regrets than anyone else. The two, who selfishly want their ex-lover to hold on to them, come up with a 'plan'. That's right, go on a fake date and try to stimulate each other's ex-lover! Will their selfish and foolish plans succeed?