Don't Kiss Before Turning 20

At the age of 18, Nanase starts a new life in sparkling Tokyo! But, as it turns out, rebooting isn't as easy as you might think, and the money is quickly spent. When she finds herself in an awkward position, she is rescued by a stranger named Shimazaki, who works at an advertising agency, and is summarily invited to dinner. Nanase, who almost starved, falls asleep on his shoulder after emptying her plate. When she wakes up, she finds an empty seat and a business card. With nothing to lose, she calls Shimazaki and gets a job offer from him...