One day, Seongah unexpectedly discovers a peculiar app that has been installed on her phone. With this app, she acquires the ability to view the affection levels of attractive men. To her astonishment, Haewon’s affection for her is already remarkably high, leading the two to begin dating swiftly. For Seongah, achieving a 100% affection level from Haewon appears to be a simple objective—however, her progress comes to a halt when it involves the 'skinship events.'