Young Yamane Rin just finished her training and officially became a flight attendant for Fuji Airlines. On her first day, she thought it was going to be a pleasant flight. Not so fast, Yamane. Apart from struggling to learn how to deal with difficult passengers, Rin meets the Chief Attendant, Hanazono Hinako, who appears to be sweet. However, that is just one of her many facets. Her smile and pleasant demeanor are just a pretense—in fact, she is a delinquent feared by everyone. She's a dauntless and win-by-a-large-margin kind of girl, who becomes a completely different person after work. This is a powerful story depicting the activities of dauntless Hinako at 20,000 meters in the air, filled with lots of airline gags.