In the Anime he appears in episode 13. In the manga he appeared in chapter 24.

When Nagi join with Yamato and Mei at Land Amusement Park. Nagi started getting along with other students, after words Nagi mention she could cook. He started to like Nagi and thinks she'll become a good wife in the future. Nagi said that he also proposed to him already, they might end up getting married before Mei.