Hanasaku Kitchen: Saikai ni wa Yakuzen Soup to Sakura wo Soete

Momoka is a capable worker who loves her job. But at home, she's completely devoid of glamour! Convenience store food is fine, and tracksuits are her everyday attire. In this state, she fatefully reunites with her childhood friend, who has grown into a handsome young man. He's opening a restaurant where he can make delicious, healthy, and beautiful dishes using his knowledge of medicinal cuisine. In fact, he's head over heels in love with Momoka, and he forcefully selects her to be his taste tester... Momoka's confused feelings, fatigue, and pre-illnesses are all resolved at once by the exquisite food and the effects of medicinal cuisine! A radiant smile blossoms within her.

(Source: Kadokawa, translated)