Introduction Da-jeong, a timid man who has a crush on White, the owner of a nearby flower shop. On the same day as usual, Hayan and his cell phone are switched and he discovers that there is a strange app. The main quest to target Hayan, the target of unrequited love, appears and Da-jung starts to move as the app wants. [Success reward: Unbreakable eternal happy ending] [On failure]: ???? And forced shutdown due to hidden keyword..? “What is the hidden keyword? And what if it fails...?"