Aoi Ichinose is a cute high school student sister. However, when working at a mini-mart called Nhắng Kực, she acts arrogant and refuses to listen to her manager. Furthermore, she is also secretly dating a coworker. One day, her boyfriend fell ill and asked her to take his night shift. Knowing about this, manager Tuấn hinted to electrician Tú, 'Cut off the power for me for 30 minutes tonight.' So that night, Tuấn had 30 minutes to scare Aoi. However, that evening, Tú went out drinking to celebrate Arsenal winning the Premier League for a bit too long and forgot to cut the power. Thus, Tuấn had the whole night to teach Aoi again how to serve customers to 5-star standards.