Atsushi, who was on a business trip to Hakata, found his return flight canceled and was at a loss... In the lounge, he was approached by a flight attendant who turned out to be his neighbor's quiet wife, Kaho. They hit it off and enjoyed a night together, but when Atsushi couldn't get a hotel room, he ended up sharing a room with Kaho's kindness. Afterward, under the guise of business trips, Atsushi continued to cheat with her at the airport and other business destinations. His actions gradually escalated, and he started engaging in acts he couldn't do with his wife, instead finding pleasure with Kaho...