No premiere date yet. Check out the ANN article for additional information. Synopsis for the source manga from AniList:

Kotesashi Kouyou possesses outstanding skill as a masseur. He aspires to become a sports doctor and wants to get a scholarship in medical school. Starting spring, he attends the high school attached to Seiwa University, a sports powerhouse. Since his family is not wealthy, he has to work as a hostel manager, where he is also allowed to stay, to pay for his school expenses. There he encounters high school girl athletes with various problems. Kotesashi’s job is to take care of them physically and mentally and be the hostel manager.