|Cleanliness is Important|
|Romanized Title||Seiketsu-kan wa daiji|
|Release Date||April 27, 2015|
An exasperated Tomo shares her frustrations with Misuzu. Misuzu explains to Tomo that just letting her hair grow without styling it will just make her look like a vagabond. Tomo clarified that she doesn't know much hair styles in general, if she was to try any style she'd probably start with Misuzu's hair style. Misuzu didn't think that was a good idea, saying it "would break [their] friendship" if Tomo did. In the end, Tomo went back to her old look.
Chapter 21 official (Japanese).
- Tomo-chan wa Onnanoko! Chapter 21