Park Jiyeon and Park Hyomin, a couple who has live together for 3 years. The things that people doesn’t know about them is only their relationship as a couple, in other words, a married couple.

Park Jiyeon, 20 years old university students and Park Hyomin, a young lecturer at the same university with Jiyeon, has been hiding about their relationship from anyone who close to them because of their parents will never agree with this kind of relationship. To keep their secret, they pretend like didn’t know each other and always avoid their eye-contact. But as lecturer, Hyomin always try to scold Park Jiyeon, as a reason to keep close to her girlfriend and they were doing some random things if there’s no one around them. Living as a couple at home and as a strangers in front of others, will this make them happy?