In this short scene, Ruchi tells us that he's just had a "naughty mouth" . He's been to the dentist's office to get a "dental check" , which is a fancy way of saying a "tooth-mache check." Ruchi wants to know why Tsuji isn't there, but he can't figure out what's going on. The dentist tells him that the check was "optional," which means that it wasn't really a check at all, but rather a "routine" check. He also tells Ruchi that the dentist noticed that Mimori's face was red, which means Mimori isn'ta good match for Ruchi. Ruchi's not happy about this, and he tells the dentist to "snoop" Mimori. He wants to kiss him, but the dentist won't let him do it, which makes Ruchi even more upset.