Autumn Moon's Chance Encounter - S0.E4

The Polar Star dorm residents, along with the Aldini brothers, Ikumi, Kurokiba, and Hayama, take a trip to the hot springs inn where Megumi did her Stagiaire. After a business trip, Alice, Erina and Hisako decide to go to the hot springs for a break, too. With all of the Inn's cooks suffering accidents, the Polar Star gang and the others took over the kitchen for the arriving guests: Erina, Alice and Hisako; who are impressed by the finely crafted meal supposedly made by amateurs, not knowing it is made by Tōtsuki students. Yukihira, intrigued by the legendary fish dubbed the 'River Master' in the nearby river, invites Kurokiba and Hayama to a fishing match Later at night, Megumi meets Erina in the hot springs bath.