Omake Gif Anime - Bokutachi wa Benkyou ga Dekinai - Episode 8 - Rizu Blows Bubbles

Rizu freaked out a little when she thought through the ramifications of talking to a boy on the phone while they were in the bath at the same time.

Nariyuki had just gotten a smartphone and a search for best learning practices was to study in the bath. Obviously all the girls and Nariyuki decided to try it, but because he was so bad at navigating a smartphone's apps, he accidentally contacted all the girls while everyone was in the bath. First up was Fumino, who was quick to chastise herself for thinking about Nariyuki's body when she was supporting Rizu's and Uruka's crushes on him.

Next up was Rizu. she started being rational about talking on the phone while naked because they couldn't see each other, but the idea of mutual nudity overheated her brain and she had to lie down.

Last up was the easily excitable Uruka. She didn't mind talking to Nariyuki while she washed herself, but she needed to put the phone down because he makes her so nervous. Unfortunately, she switched to a video call instead of putting him on speaker and she screamed so big when she saw Nariyuki and realized he could see her.

The second half of the episode had Nariyuki convincing himself that he wasn't the target of Uruka's crush, even though he overheard her friends mention his name. The harem points movement here was that Nariyuki became more aware of Uruka as a pretty girl.