The SD Character Flash Anime is a special addition to the anime series' official website. Each "episode" features a different character, drawn in a super-deformed style, set to a song sung by the character's seiyuu.

At Kaimei High School, the Living Assistance Club (aka the Sket Brigade) was organized to help students with problems big or small. Most of the time, though, they hang out in their club room, bored, with only a few trivial problems floating in every once in a while. In spite of this, they still throw all their energy into solving these worries.

[Source: Crunchyroll]

Special aired a couple of days before episode 5. It's a mix of explanations, recaps, and a seiyuu interview.

Adaptation of a popular manga chapter bundled with the 29th volume of the manga.