Kaori: But, Onee-san, could you be my tutor, too? My grades aren’t so great.

Touko: I’d love to, but I can’t because I have a lot of work to do at the university. If I find a good tutor, I’ll recommend her to you. You can repay me by being really nice to Lain.

Kaori: Wow! You really are like a big sister. I wish I had a sister. I’m an only child. Lain’s an only child, too, isn’t she? Does she have siblings? My mom said something about Lain having a sibling in the hospital, and that that’s why neighbors avoid her house.