Keen on Keane is an episode of The Powerpuff Girls, premiered on December 6, 2002. This episode is set on Valentine's Day.
The episode starts at Valentine's Day in Pokey Oaks Kindergarten. Ms. Keane is looking at Blossom's card, which appears to be a heart-shaped, colorful city skyline. A moment later, Bubbles comes running with her smaller card with Cupid’s arrow. Buttercup shows her next card with plenty of glue, then returns to play with Mitch Mitchelson and black-haired girl. Three other girls are talking about dates, which causes on Mitch, Buttercup and girl a stupid actions, especially on Mitch, but Ms. Keane puts a stop to it when she steps up. Blossom asks her that who's her "sweetheart", but says that she doesn't have time for dates. The girls trade a bit worried.
The Powerpuff Girls are watching a romantic movie with scene of engagement of Derek and Gabrielle. Professor Utonium calls the girls for dinner and shows a special dish which he made: a large, heart-shaped meatloaf with a caption "Be Mine". Blossom asks Professor where he goes out for a dinner. Professor doesn't understand a question and Buttercup begins to poke fun. Bubbles asks him who's his "sweetheart", but Professor says that he doesn't have time for dates. It turns out that Professor and Ms. Keane are singles and the girls get an idea.
At Ms. Keane's house, Ms. Keane is writing something in her notebook and her cat named Valentino is peacefully lying next to her. The doorbell rings, and she goes to answer. Her cat trails behind her. She opens the door, looks out at the welcome mat and notises a pink rose and a note addressed to Ms. Keane. Quickly starts to read a note, which is written in a neat hand. The same thing Professor does. The note says that Professor Utonium and Ms. Keane have to meet each other "at the finest restaurant in Townsville, at the corner of Amore Avenue and Passion Parkway", which reveals to be "Pete’s-A Pizza".
Professor Utonium and Ms. Keane soon realize that the girls set them up, and take the girls home. However, they decide to go on more dates with each other, and become sickening sweethearts. They hog the Powerpuff hotline, and neglect their duties, to the girl's dismay. Eventually the Mayor tells them to stop, and they apologize for using the hotline. When Ms. Keane mentions she's been neglecting her cat, the professor becomes nervous since he had a bad experience with a cat. Ms. Keane doesn't believe his story, and the two break up.