He nods and smiles, happy to know hear Kaoru's agreement. Then the explanation gets a look of understanding out of him.

"Oh! Yeah, she helps me study. It's hard but I like doing it." 'Student' or 'school' are foreign terms to him. There's simply Tsukumo, a friend generous with her time who agrees with the rest of Nai's company that he's in dire need of basic education.