Confession Battle, the One Who Confesses First Is the Loser!

The young Gu Sui made an agreement with a girl that if the girl opens his lock next time they meet, they will be together. Gu Sui, who stuck to his faith, was forced to cooperate with a violent woman, and the two ran a cake shop together. In this life that changed a lot, he also met more and more girls and interacted with them. The strange thing is that each of them seems to have a key in their hand. Where is Gu Sui's true love? Who will he choose in the end? A funny romantic comedy revolves around the story between them, and this begins.