It's Mad Scientist Week as another faux-cola potion turns Bossun invisible and then later, Bossun puts on an artificially intelligent "power suit" created by Switch... But the suit soon develops a will of its own!

The rock group The Sketchbook has their 4th single “Colors / Birthday” set for release on May 30th. The single, like their other three, is featured as a theme song for anime SKET DANCE. Track “Colors” is featured as the 5th ending...

Bossun has a new e-mail friend, as does Himeko... In fact, they both start to fall for their respective pseudonymous pal, unaware of the person's true identity!

When Switch's laptop is on the fritz, he's left speechless. Can Switch finagle a backstage pass to Momoka's concert and be his usually suave self when he's only got a sketchbook to work with?

After Bossun drinks another one of Chuu-sensei's concoctions, his feelings and expressions become mismatched! And then, Bossun becomes an origami master, but can he overcome nervous jitters to win a major contest?

When Yuuki falls under the influence of a seemingly scamming celebrity psychic, it's the Sket-dan to the rescue! But to take down the fraudulent fortune teller, they'll have to head to her home turf, at a seminar in front of hundreds of true believers!

The Sket-dan try to help Koma-chan, a huge girl with a tiny voice. Koma-chan wants to find love, but every time she gets nervous, her near-superhuman strength is unleashed, as Bossun learns firsthand!

The Sket-dan meets Saaya, a first-year student who's got tsundere troubles. She wants the Sket-dan to help her stop being so snotty around boys and Bossun becomes the test subject! Then, it's a real hoot as the Sket-dan and Saaya try raising an owl in the clubroom!

First, Bossun and Tsubaki partner up for the first time to work on a project, but together, this brother duo is highly combustible! Later on, Tsubaki meets Bossun's family and has the chance to see his real parents for the first time... but does he want to?

After a bit of horsing around, Himeko accidentally breaks Bossun's fingers and wrist. To pay him back Bossun makes Himeko sign a contract making her his servant! But having Himeko as a maid isn't all it's cracked up to be. Meanwhile, Jin is back trying to woo Himeko, but when he comes to observe the Sket-dan's activities, all he can see is a loving, bickering couple!

Countries from around the world gather together once every four years to celebrate the most ancient of traditions, the pinnacle of sports! Testing their own passion and training against the best the world has to offer, the Sket-dan goes forth, with the pride of their country on the line! Will the goddess of victory shine down on our heroes? Will they be able to claim that yes, they are the winners of the Genesis World Grand Prix?!

It's the Kaimei School Festival, and Bossun's class is doing a maid cafe. Everybody's parents show up, and Bossun is approached by a man who claims to be the doctor who delivered him. He has finally decided to tell Bossun the truth of what happened that day, which he has kept secret for 17 years...

On Bossun's 15th birthday, he finds out the truth about his parents. Unable to cope with the tragedy, he lashes out, only to meet the child his father once saved when he was a kid, all grown up, who gives him a letter...

One day, Bossun discovers a box of video tapes in his mother's room. The videos show his young mother, a pretty woman named Haru, and a man who looks just like him...

J-son-sensei has another meeting with a prospective marriage partner, but this time the Sket-dan has a plan! Meanwhile, Onee-san is also asked out on a date! Everything goes completely smoothly with no mistakes or mishaps at all this week on Sket Dance!

Captain comes to the Sket-dan with another request: Search for a can of candy drops that was thrown into the bushes. The Sket-dan does everything they can to help her find it, but what's so important about some can of candy, anyway?