Bea has a girl sleepover party and Milo and Oscar feel left out, so attend the party as Milina and Oscerlisabeth. Chelsea and Bea let the other girls know that they are Milo and Oscar. But instead of confronting them, the girls then make them do what girls really do on sleepover parties.

Milo ventures out of the fish tank alone, so Bea and Oscar follow him. The three best friends catch the eye of the pet store cat Wilfred, and Milo must put aside his differences with the others to save the day.

When Bea goes on several dates and Milo gets a date, Oscar feels he is the only one without a girl so and pretends to have a girlfriend named Doris Flores Gorgeous, but he struggles to keep it a secret from Milo and Bea. He tells Milo and Bea that Doris lives in Fish Niagara Falls so the friends try to "cheer up" Oscar by taking him there. When they get there, there actually is Doris who turned out to be Clamantha.

Milo tries to follow his dream by playing on the Football team but gets the job of Water Boy. Little does he realize the importance of his job, since the football team is playing at the Gecko tank.

When Jocktopus's birthday comes up, he warns every student in freshwater high that if they don't bring a gift for him, they will get "pounded" by him. When shopping for said gift Oscar suggests getting him money, which results in Oscar himself being given as a gift by his friends who don't want to be pounded. Bea and Milo try to get him back.

Bea decides to take a job at Fish Flakes but soon misses her old carefree life, but no one will let her quit. Meanwhile, Milo and Oscar get sent to daycare after being mistaken of being Bea's babies. Oscar dislikes the babies, but Milo wears a diaper and stays nearby.

Milo and Bea get a dog named Murphy, who Oscar doesn't like. Oscar ends up yelling at the dog and as a result the dog runs away. Now Bea, Milo, and Oscar will have to go and find Murphy.

When the school homecoming dance is coming up, Bea must be chosen to be Homecoming Queen. But her "embarrassing" parents have signed up to be chaperones. So Milo and Oscar help plan a fake school dance to stop them from ruining Bea's chance at becoming queen.

Bea and Oscar help Milo study for his final exam so he doesn't get held back a grade like their old friend Kevin. To do this, they must find Milo's un-traditional way of learning.