This is the first episode where Tokiko admits she has romantic feelings for Kazuki.
Tokiko: (in her swimsuit) What is it? Is something unusual?
Kazuki: Oh no, it's nothing strange. (points at Tokiko's navel) It's just that your navel is exposed...
Tokiko: (covers her navel) Don't point! I only bought this one because it was the only one they had. It couldn't be helped! And anyway, you've seen my navel before, haven't you?
Okakura: You've seen it?
Kazuki: Did I?
Tokiko: I told you to stop looking!
Saa-chan: They're so intimate!
Chii-chin: Or rather, it's like something out of a junior high school student's diary...