Yukemuri Ryokan: Himitsu no Settai - Ikemen na Kare to Ikenai Watashi (2015)

Blurb:
"Ma’am … are you wild?" Servicing guests with her mouth and letting them touch her private parts … Isn’t this the wrong type of customer service for the young proprietress to be offering? "Juice is just flowing from her hole. She’s so slippery." Responding to the demands of her guests, performing with her mouth and having sex … But this is the only way to keep them coming … isn’t it? After running "Sawatari," an established hot-springs inn, for many years, Moeko's mother falls ill. Now it’s up to her to keep the business going. With help from Mr. Tomioka, a business consultant, she vows to work through the tough financial situation and bring the inn back to life, but the going certainly isn’t smooth! She bites her lip and tries to endure the erotic demands from her guests so they’ll be happy … But wait … She never meant to go that far …!!

Source: www.anisearch.com/manga/35018