Blossom remembered when they had a fourth sister. She wasn't an official Powerpuff Girl, but they all raised her the best they could based on how they were raised with their superpowers. Bunny. They all cried when Bunny was destroyed suddenly. Bunny never left their minds and hearts, they covered it up with other generations and past times to help cope with her loss and get over it, but in reality, they all deeply missed her, they just rarely spoke of her again. Blossom told Dexter about her after he told her what happened to his own sister. The Girls all agreed that Bunny wouldn't want to see them sad or miserable without her. That made Blossom have an idea then. Dee Dee probably wouldn't want to see Mike and Juniper fighting and being at each other's throats, blaming each other for Dee Dee's untimely death. The leader girl knew what she had to do in school tomorrow.
The mysterious girl was sleeping in the guest room by the time it was after dinner and TV and homework time for the Girls. Bubbles was feeding Courage his dinner before joining her sisters in the living room to do their homework together like normal sisters. Buttercup wondered about the stranger girl in their home, Bubbles was focusing on petsitting Courage, and Blossom was thinking of what she should say to Mike and Juniper without making them worse than they already were about Dee Dee's death causing a strain in their friendships.
That night, the Girls went to their seperate rooms. Courage slept on Bubbles' bed, feeling nostalgic for when he lived with a sweet old lady who had left him in Jack's care in the very beginning. Courage missed her a lot, but was more thankful to be alive because his old family had been dying after Courage was happily adopted by Jack. Nothing out of the ordinary here yet.
The next morning, the mysterious girl was gone. The Girls couldn't help but wonder if she were a figment of their imagination of sorts, a spirit in disguise, or just a random stranger allowed in their house. The Girls were about to go out to fly to school, but the Professor stopped them and offered to drive them to school on his way to work. The Girls shrugged it off and went inside his car with Blossom in the front passenger seat and Buttercup and Bubbles in the back.
"You're all probably wondering who our new guest is." the Professor spoke up, never taking his eyes off the road.
"Huh?" Bubbles and Blossom had been in their own business, they nearly forgot her.
"Yeah, who is she and why is she in our house, Professor?" Buttercup asked.
The Professor heaved a sharp sigh and turned, friendly to them. "Well,... Do you three remember your morning kindergarten teacher way back home?"
"Ms. Keane?" the Girls asked. You never forget about your kindergarten teacher. The other elementary school ones maybe, but never your kindergarten teacher.
"Yes, Ms. Keane," the Professor confirmed. "Well, a few years ago... She and I had made contact and saw each other again. We almost got married."
"Aww!" Bubbles marveled. "Did you or she say yes?"
The Professor swallowed hard and sighed again. "We never married or spoke of engagement again... We had a little problem before we decided to get serious..."
"What is it, Professor?" Blossom asked.
"Well, Blossom, sometimes when you really like someone, you tend to do... Crazy things... That thing became a lot more serious nine months later, and Harley was born."
"Harley?" the Girls asked.
"Yes, Girls, Harley. Harley Keane is your new sister, she is my responsibility now."
"What happened to Ms. Keane, Professor?" Buttercup asked.
The Professor frowned and looked up at the distant sky. "She's in a better place now..."
"Oh, Professor!" the Girls gasped sadly.
"It's okay, Girls, just remember, some people do crazy things when they're in love." the Professor concluded.
Blossom took that note the most from the Girls. She met Mike in the forest and they had sex together. Blossom wasn't sure if anything would happen since Mike was a girl too and she probably wouldn't risk teenage pregnancy.
The bell rang in Megaville Junior High School. Mike and Juniper walked on other sides of the hallway, walking and minding their own businesses away from each other. Both girls deeply scowled at each other, but then they accidentally bumped into each other in the hallway, knocking each other down.
"Watch where you're going!" Mike hissed at the Chinese-American girl.
"You watch it, it's all your fault anyway!" Juniper snarled.
"No, if it's anyone's fault, it's yours, everyone knows it! Dee Dee would side with me! She was my best friend before you came along!"
"I was the new girl in the neighborhood, Dee Dee probably told you to come say hello to me!"
"Shut up, JUNE!"
"You, Michelene!"
Mike's eyes turned red as her jacket. "Don't you dare call me that, Juniper Lee!"
"Make me Michelene." Juniper smirked.
"THAT'S IT!" Mike wolf pounced on Juniper, about to beat the crap out of her.
"Stop!" Blossom charged to them, separating them once they all got on their feet. "Guys, stop fighting!"
"Stay out of this, Blossom, this doesn't concern you!" Mike growled.
"Aw, let your pretty friend talk, Michelene." Juniper taunted.
"Both of you stop!" Blossom continued. "It's no one's fault about Dee Dee! Can't you guys stop? Dee Dee's soul is put to rest, do you think she'd want to see her two best friends arguing?"
Mike and Juniper stopped. They realized what Blossom was saying was right.
"Dee Dee was always the soft, sensitive one..." Mike whispered.
"Yeah, she always got us to stop fighting." Juniper admitted, quietly.
Blossom smiled. "You see? Stop fighting! It doesn't make any one of you look cool!"
"Yeah, you're right, sorry Blossom." Juniper whispered.
"Yeah, sorry." Mike added.
"Don't say sorry to me," Blossom prompted. "Say sorry to each other."
Mike and Juniper looked at each other in the eyes. They both sighed heavily, smiled and apologized to each other.
"There, now doesn't that feel better?" Blossom smiled.
"Yeah, it does." Juniper smiled.
"Sorry, June, but seriously, call me Michelene again and I'll whoop you so bad your grandchildren will feel it!"
Juniper laughed and rejoiced with Mike into a hug.
Blossom smiled and walked off to see Bell and Dexter.
"I take it your friends all made up?" Bell asked.
"Yeah, seems like it." Blossom answered with a smile.
"Dee Dee would be proud." Dexter remarked, fiddling with his glasses.
"Come on, let's get to class, Dex." Bell took his arm, following him to their next class.
Mike and Juniper caught up with them and they went to the next class.