After dinner...
What's up? You seem kind of down...
It's nothing...
About Sonoko?
Ho, how did you know?
It's pretty obvious; you are staring at her the whole time.
Really?
But you don't need to worry. Sonoko is helplessly dense, so it is impossible for her to find out your feelings for her.
Heh, that may be true. It's exhausting today, I'm gonna get some sleep.