Funzō thanks Bossun for helping his sons and does a super rolling grovel out of the window. In the maid cafe, Funzō makes an order to Moe with his sons. Then, Akane and Rumi arrive to the maid cafe. Akane marvels about how beautiful Himeko has become. Rumi asks Switch about Bossun's relationship with Himeko and wonders if Bossun will be after his little sister. Switch replies that they are friends and assures her that Bossun would never go after Rumi that way. Outside, Dr. Tsubaki finds Bossun, and he begins apologizing to Bossun once he and Bossun are on the roof. When Dr. Tsubaki states that there is someone who shares his blood, Bossun recalls his father's letter. He realizes that he has a twin brother. Dr. Tsubaki states that he has harboring this secret for 17 years and says that his son had already found out. Bossun thinks back hard and realizes that Sasuke is his twin brother. Meanwhile, Sōjirō and his student council group wonder where Sasuke is.

In the second Arc finale, Switch's "origin story" continues as Sawa-chan goes to young Switch and his older brother for help from a stalker. In a moment of spite stemming from jealousy, though, Kazuyoshi sends Switch and Sawa off on their own to buy personal protection items. While they're gone, Sawa's friend Yukino warns Kazuyoshi that the stalker is also a slasher. Kazuyoshi means to go out after his little brother and the girl he loves, but fate intervenes...

Angry at the world and surrounded by loneliness, Bossun finds himself at the place where his father was slain in a car accident. A young man appears and explains to Bossun why his father died. He gives Bossun, a letter and present from his father that was supposed to be given to Haru. When Bossun sees a young man bullied by delinquents, will Bossun follow his father's philosophy or will he just live for himself?

Bossun, Himeko and Switch are having a normal day.

Himeko breaks her Cyclone while helping a client who was being assaulted for some cash from a bully. Because of that, she has to buy a new field hockey stick. As she bought one, she's reminded of her past before she met Bossun and Switch. As a result, Hime goes to a high school named Kaimei Academy where she meets Captain and Bossun.

Himeko can bend her hands back at the wrist, leading Bossun to give it a try - so Himeko helps him out. Of course, her "help" results in his arm in a cast. As compensation, Himeko is charged with acting the part of Bossun's maid until his arm heals.

After helping Yosshi arrange a date, the Sket-dan run into Shinzou arguing with his younger brother. Unlike the proper samurai, his younger brother is rebellious and they don't seem to get along... The two's relationship reminds Switch of his own brother and the events of the past...

Bossun makes friends with a violinist while practicing for the upcoming Rock Festival, Sugisaki Ayano. He learns from her how fun music is, and in no time the curtain rises on the Kaimei Rock Festival!

It's the second to last round, and it's a battle of love between the pitch perfect rich girl and the klutzy, head-in-the-clouds Roman-tic! Which one of the will break their team's hearts?

Himeko was once a delinquent feared far and wide, the legendary yankee Onihime. She's totally reformed now, but starts to hear odd rumors that "the Onihime has started going on a rampage again.

Uchida Takaaki comes to the Sket Dance with a simple request: make him popular! Bossun and company immediately set their sights on getting Uchida to win a Mr. Popularity contest in their class, but Uchida's shy personality makes it difficult for him to stand out. Can Sket-dan Productions mold him into a star in just one week?!

Yabasawa-san really wants a certain part for her avatar, and asks the Sket-dan to join a game tournament put on by a cellphone game site. The Sket-dan isn't particularly enthused about the prospect, but when they find out that the Student Council will also be participating...

Kaimei Academy's music festival is coming up! Bossun is bummed that Himeko and Switch each have joined up with bands to participate. But before long Bossun is invited to join a band and the three are set to compete against each other!

Tetsu comes and asks the Sket-dan to meet with someone in his place. It seems like a sickly girl who he was exchanging messages with under a false persona wants to come see him...

A writer for a local newspaper is coming to interview and take a photo of the Sket-dan, and Himeko demands that Bossun get his hair cut. But when Bossun refuses, Himeko takes things into her own hands... What could possibly go wrong? Afterwards, it's the principal's birthday, and the Student Council is planning a surprise party for him. But when the President makes a mess of his prized bronze bust, the principal will be in for a whole different kind of surprise...

The second game of the Bibage Battle is a real show between Shinzou and Tsubaki, coming to a truly cinematic finish! Then the curtain rises on a sharp-shooting (or is it, sharp-tongued) battle between Switch and Daisey!

Bossun may have a way with words, but these clients were born with their feet in their mouths! First is J-son-sensei, the shop teacher with the glass heart and looks straight out of some horror movie! Can the Sket-dan help him find love? A man of few words and many offstandish poses, "Dante" perhaps poses the greatest riddle of all... Can the Sket-dan help this Fallen Angel find his Wings

A transfer student arrives on campus, and the three members of the SKET-dan introduce themselves, hoping the new student will join, but he politely declines. He returns soon after, covered in red paint as the apparent victim of bullying, asking the group for help. After investigating, they discover the culprit is actually the transfer student himself, who was operating under duress from the school bully and childhood acquaintance. After setting things straight, the new student is able to fit in comfortably at the school, and the members of SKET-dan look forward to their next task.

Tsubaki from the Student Council tells the Sket-dan they're going to be disbanded. In order to prove the Sket-dan's effectiveness, Bossun takes on a request to put on a play for a local preschool. But the Student Council also takes on the same request, and the battle is on!

The Sket-dan is having fun trying to take their minds off the upcoming midterms, when they hear rumors of a mysterious DVD that will curse you with bad luck if you watch it. Just then, Kuramoto Ayumi comes in with a simple request, to help cheer up her friend who has been acting strange lately. But there's more to this than meets the eye, as the stoic Yagi is acting like someone who has seen something they shouldn't have...

Bossun and Himeko get into a little fight, and things are made worse when Bossun and Switch are invited to a mixer with Seiji and three other girls. Bossun is rarin' to impress with his comedic flair, but he's in for a tough crowd. Without Himeko's fiery comebacks, Bossun's humor falls flat...

Saotome Roman, member of the Manga Club, runs into her "prince" on a hill road on her way back from school in the rain. In order to meet her prince once again, Roman comes to the Sket-dan to ask their help, but...

Bossun bumps into Himeko outside on the weekend, and they happen to spot Switch and Yuuki meeting up nearby as well. Their curiosity piqued, they decide to trail the 'odd couple' into a shopping mall. Turns out Switch is helping Yuuki with a request- to choose and purchase a laptop, so she can create a website dedicated to her passion of all things occult. Hijinks ensue, with the embodiment of 'Otaku' and 'Occult' clashing their interests and respective positions(supernatural vs science) against each other all the way(in their usual fashion). Nonetheless, they seem to be getting along well(again, in their own way), and even Bossun and Himeko note how unusual it is for Switch to be going out of his way to help his 'archrival', Yuuki. Switch and Yuuki then bump into her old crush from middle school, Kobayashi, who was there with another girl. He talks down to Yuuki, which seems to rub Switch the wrong way.

The Sket Dan + Chiaki go to Mpruin Chipesbu... Chipepe... er... a strange foreign country to play in the national Genesis tournament. Chiaki is new to the game, but manages to catch on quickly - especially when an all-you-can-eat buffet is named as a prize!

Yuuki Reiko, member of the Occult Club, barges into the Sket-dan's room holding a picture of one of Kaimei Academy's seven mysteries, the "Ghost of the Incinerator". The Sket-dan are on the case (mainly Switch), trying to find out the truth behind the picture, and getting Shimada Takako from the Newspaper Club mixed up in it, too...