Sensei called Karin to ask how was she. He was seemingly hungry, and Karin had to wait at home for a delivery, so they agreed on meeting at Kanda Apartment, so she could prepare a meal for Sensei.
When he arrived, Sensei pointed out his problems with memories in the middle of the talk, which made Karin determined to take care of him if she must. But after that, she showed Sensei the meal. Actually, Karin made a generous dinner for two persons. So they have a dinner together, and Karin had another chance to practice conversing with the guy she likes.