The main characters of Love in Login are game addict Seong-hyeon Kwon and Da-hye Park, who is online 24/7.These two once believed that the world of game is all there is in life... until they encounter each other in real life.The two main characters experience work, youth, game, and love life.Can they succeed in all aspects of career, youth, game, and love life? "An in-game friend for over 8 years turns out to be a girl? Wasn't your ID Flute Fiddler? Weren't we buddies?"Seong-hyeon, who works at a game company, is waiting in a cafe to sign a contract with the winner of an illustration contest. That is how he meets Da-hye Park. Heavy rain started to pour. After signing the contract, Seong-hyeon shares an umbrella and walks Da-hye Park to her home, but sees that her home has been flooded. Da-hye Park has nowhere to go, so he takes her to his home... Why is she so careless?