Short specials included on the BD/DVD volumes of "Sekai de Ichiban Tsuyoku Naritai!"

While pursuing an alien fugitive, Birdy Cephon Altera—a bombastic police officer from the Space Federation—finds herself on Earth. Her target, Geega, has disguised himself as a human and assimilated into the fashion industry, so Birdy follows suit and joins a modeling agency, taking on the identity "Shion Arita." Her position as a rising model has her posing for photo shoots by day and chasing intergalactic criminals by night. Meanwhile, Tsutomu Senkawa, an average high school student, explores an abandoned building with his friend, and coincidentally, Birdy has tracked down Geega to the same building. Senkawa briefly witnesses the battle before being seized as a hostage by Geega. However, Birdy, oblivious, attacks Geega and accidentally kills Senkawa. Distraught, she quickly decides to save him by integrating his consciousness into her body. Now, Birdy and Senkawa must not only cohabitate the same body, but also balance Senkawa's high school life, Shion Arita's modeling career, and Birdy's increasingly dangerous job as a Federation officer. [Written by MAL Rewrite]

"Housing Complex C" centers around Kimi, who lives in a small, low-cost housing complex located in the seaside town of Kurosaki. Trouble seems to follow her wherever she goes, and horrific incidents begin to occur. Is an ancient evil stalking the residents of Housing Complex C?

Takashi Kamiyama is your typical mild-mannered high school student—polite, aloof, and pacifistic, with a slightly above-average IQ. But would your average high school student really enroll himself at the infamous Cromartie High School, known as a breeding ground for the toughest delinquents out there? Apparently so, as that is exactly what Takashi does, though for reasons he'd rather leave unmentioned. However, one thing is for sure: the "hard-boiled rabbit in a den full of hungry lions" is never going to have another dull day. And how could he, now that he's surrounded by mohawked punks, obnoxious robots, and... gorillas? And was that Freddie Mercury riding a horse down the corridor? Follow Takashi as he earnestly dedicates his new high school life to better his school's reputation while his classmates are hellbent on wreaking havoc.