Karin Kokubu rescues a yellow piglet on her way to school. The piglet turns out to be the prince of an alien planet, though, and turns her into the super-pig Buurin- but she'd rather be any other kind of hero.

Karin's school is having an important soccer match with a rival school, one known for their unfair tricks. Koichi, the star player of her school's team, is going to be the victim of these tricks unless Buurin does something about it.

Karin and her best friend Masami have a falling-out during tennis practice. Having a hard time making up, Karin decides to use Buurin to repair their relationship.

A local park is hosting a female pro-wrestling tournament. Among the wrestlers is an amateur, Buutan, who dresses up like Buurin to fight.

Karin's school's athletic meet is hosting a very special event: a tug-of-war match where all of the first-year students compete with Buurin. Koichi is having trouble organizing the event, though.

On a history field trip, Karin finds an ancient clay figure that looks a lot like Buurin. It leads her to some ruins that give some insight into Buurin's history.

A real bank robber interrupts a live show starring Cutey Chao, Karin's favorite heroine. Buurin must stop him quickly.

Karin has been eating a lot lately, but after a comment from Koichi she decides to go on a diet. She goes too far, though, and gets weaker and weaker- this soon starts affecting Buurin's performance as well.

The race circuit that Keiko Kuroha's family owns is hosting a solar car race. Karin and some of her friends enter a Buurin-shaped car in the race, driven by Ms. Tateshi. When the weather takes a turn for the worse, the situation becomes tense.

Shinichiro Kokobu, editor-in-chief of the Akebono Times (and Karin's father), is on the hunt for a big scoop. He has a new target that he's doing some investigative journalism on- Buurin!

The school's cultural festival includes a 'best couple' contest. Lured in by the promise of a romantic meal for the winning couple, Karin tries to win with Koichi.

Kashiwagi has been really into the supernatural lately, and things are dialed up a notch when a series of coincidences leads him to believe that he has supernatural powers of his own.

As Karin prepares for a big test, she finds out that Ton has a test as well. If Buurin doesn't collect 50 pearls by the deadline, Ton won't be able to become king of Buuringo.

Koichi's making a movie, and he and the others have a perfect pick for the lead actress: Buurin!

Kaoru, disheartened by littering citizens who won't change their ways, decides to take the task of picking up garbage into her own hands. Buurin ends up helping her.

Karin is looking forward to giving Koichi a gift at a Christmas party. He says he can't come, though. Karin is suspicious- he says the reason is that he has a date with Buurin!

Karin comes across an opportunity to see if her future is with Koichi.

There's a big New Years' party at Karin's place! All seems well, but Ton is shut in Karin's room, missing his home planet.

Karin and Koichi get to go (with the rest of their class) to a ski camp. Mr. Arashiyama seems nervous and soon enough Karin finds out he wants to profess his love to Ms. Tateshi.

There's a cool plant in the school (and it's named after Keiko). Trouble arises when the plant grows out of control and Buurin must defeat it.

Karin faces complicated feelings towards Koichi and wonders who he likes.

Ton is in love, and not with someone back on his home planet, either.

It's valentines' day, and. Buurin is helping a local sweets shop to deliver chocolates around town. As orders pile up, she worries she won't even have time to give chocolate to Koichi before the day is over.

Karin's father waits for a natural phenomenon to occur.

Karin has to choose a doll for Girl's day. She's conflicted about which to choose, though.

Buurin and tennis intersect.

Buurin needs to recharge, but has to rescue a puppy and stays transformed for a bit too long, then faces the consequences.

Karin's younger brother has a girlfriend, Hitomi. All is fine until Karin finds out Hitomi has a familiar older brother, one who stood against Koichi's soccer team a while back...

Keiko funds a class trip to Hawaii.

A rumor concerning Buurin is spreading in Hawaii.