Bonus Material: The print collections include various bonus material, including 4-koma comics and bonus stories. These stories sometimes feature fanservice or risque material that would presumably have a hard time getting published in a shonen magazine.
The Other Darrin: For the Street Fighter V scene in Episode 11, all of the Street Fighter characters were inevitably recast.
Portmanteau Series Nickname: Tonikaku Kawaii -> TONIKAWA. It is used as the official title of the anime series.