Heba! Hello-chan (1992)

Blurb:
She’s cute. She’s a barrel of fun. She’s irrepressible. And...a bit of a klutz. She’s Haruo Hattori, and now she’s leaving her little country farm town, her boyfriend, and her loony family for college in the big city. Before she leaves, she makes a pledge that she’ll remain true to her boyfriend, despite all the temptations a big city can throw at her, and the temptations pile up like cordwood when the need for a few yen to rub together nets her a job at Club 9, a hot hostess bar. The charming country girl lights a lot of fires in the hearts of the club patrons, and her short skirt is fanning the flames! How ya gonna keep `em down on the farm once they been to Club 9?

Source: www.anisearch.com/manga/621