It was a bright, sunny day in Unikingdom as Unikitty walked out of her castle with a bunch of heart-shaped cards in hand, "Happy Valentines Day Unikingdom!" she cheered as she began to float down the path while spreading the cards around. Her travels took her around Unikingdom to its various citizen. She gave FeeBee a flower bouquet in the shape of a heart. She stuck a card onto Richard's head while he was reading. He went to the slime monster couple and gave them a gift basket, while they gave her a piece of heart-shaped slime. Finally, she found Master Frown and Brock and gave the both of them cards, prompting Brock to give her cookies in return and Master Frown to rip up the card after she flew away.
She eventually came to Dr. Fox, who doing some final preparations on a project. She noticed Unikitty coming toward her, "Hey Unikitty, happy Valentines Day! My appreciation for you is laser focused." she said while taking out a laser gun that shot out heart-shaped lasers that deformed and made colorful shapes in the air.
"And my friendship for you is in my genes." Unikitty said, taking out a chocolate DNA model and giving it to her.
Dr. Fox took a bite out of it, "Mmm, chocolate. Very tasty. Puppycorn's gonna love the gift you thought up for him." she said, referring to the project she was working on, a chocolate hot air balloon in the shape of a heart with a drawing of Puppycorn on the side. Dr. Fox then got into the balloon's basket, "Let's run through that plan again."
"Got it." Unikitty said while taking out a chocolate model of Doki Diamond Fun Land, changing her voice so is sounded deeper and more serious, "Step one: I'll take Puppycorn to the Valentines Day celebration at Doki Diamond Fun Land." she said while taking two chocolate figures of her and Puppycorn and moving them through the model. She then moved them to the top of the Ferris Wheel, "Step two: I'll then take Puppycorn to the top of the Ferris Wheel." She then got out a model of the balloon and moved it toward the Ferris Wheel, "Step three: You arrive at the exact moment we reach the top. Step four: Puppycorn is thrilled, mission accomplished." she finished.
Meanwhile, Puppycorn was in his room making his Valentines present for Unikitty, a big clay heart. He mashed several pieces of clay together until they were in the exact shape of a heart. Unikitty then walked up behind him, "Hey little bro." she greeted.
Puppycorn simply looked at the heart with a puzzled expression, "Hello?"
"Puppycorn, it's me Unikitty." Unikitty said.
"Unikitty? How did you get in there?" Puppycorn asked, not realizing that Unikitty was behind her.
"Puppycorn." Unikitty said again.
"Oh no! Unikitty's stuck inside this clay! I'll save you sis!" Puppycorn shouted as he smashed up his present in a bid to find Unikitty.
"Puppycorn."
"Unikitty! Oh, Unikitty!" Puppycorn cried while he cradled the remains of the present.
"Puppycorn, I'm right behind you!" Unikitty said.
Puppycorn finally turned around and handing Unikitty the broken present, "Oh, Unikitty there you are! Happy Valentines Day! Here's your present."
"And I have a present for you little bro." Unikitty said.
"Really?"
"Its the most amazing... fantastic... well-made... present ever!" she said. Puppycorn cheered and laughed as she said this, bouncing and rolling around on the floor in happiness, "But you can't have it yet." Unikitty said, causing him to stop.
"Can I have it now?" he asked.
"Nope." she said.
"How about now?" he asked again.
"Do you want to ruin the surprise?" she asked.
"Yes!" Puppycorn shouted.
"Ah, ah, ah." Unikitty said.
Puppycorn threw himself in front of her, "Please tell me!"
"Sorry, you'll just have to wait." Unikitty said while walking way, Puppycorn clinging onto her as she dragged him along while he begged her to let him see his present.
Unikitty managed to drag Puppycorn for quite a distance before she stopped, "Here it is!" she said, causing Puppycorn to look up.
Doki Diamond Fun Land was right in front of them, the theme park decorated with all manner of Valentines decorations, "A theme park!" Puppycorn shouted as he ran through the front gates, "Alright, everybody out! This is now my theme park!" Puppycorn said.
"It's not the theme park." Unikitty said while walking up to him. She then pulled out a quarter and gave it to Puppycorn, "Now, take this quarter and-" she started to say.
"Oh my gosh! A quarter, I've always wanted-"
"It's not the quarter. Just take that quarter and buy some cotton can-" Unikitty started to say.
"Cotton candy, I don't believe it! Cotton candy!" Puppycorn shouted as he chased down Cookie Guy, who was operating the cotton candy cart.
"Doc to Kitty, come in Kitty." came Dr. Fox's voice from a walkie talkie that Unikitty had with her.
"Kitty to Doc, I read you loud and clear." Unikitty answered.
Dr. Fox was currently flying towards the theme park in the chocolate balloon, "I have visual on the theme park, should I move in?" she asked.
"Not yet Doc, Puppycorn's still trying to figure out what his Valentines gift is." Unikitty said.
"Alright, I'll be on stand-by, over and out." Doc said before hanging up and putting away the walkie talkie, "That Unikitty." she mused afterwards. Her thoughts were interrupted by a distant chirping sound that was getting closer. She turned towards it and saw a large flock of birds flying towards her, "Pidgeons... Chocolate-eating pidgeons!" she shouted in alarm.
Back at the theme park, Puppycorn had stopped chasing after the cotton candy, "Well, if its not cotton candy than what is it?" he asked Unikitty.
"You'll have to guess." Unikitty said.
"Is it... this tent?" Puppycorn asked while pointing at a tent.
"Nope."
"This guy?" Puppycorn said while holding up Old Timey Mustache Man, who was standing in line for a ride.
"Nope."
Puppycorn then looks down at the floor where a pile of dirt could be seen, "This pile of dirt?"
"Of course not!" Unikitty said while giggling.
"Hmm... I know! If it's not in the theme park, then it's probably on top of Mount Climb Up and Fall Off!" Puppycorn said while pointing to a nearby mountain outside the theme park. He runs toward it before climbing up and falling off, after which he goes back into the theme park, "It's not there either."
"Are you sure?" Unikitty asked, prompting Puppycorn to go towards the mountain again. Unikitty took this moment to call Dr. Fox, "Kitty to Fox, you can bring it in now.
At that moment, Dr. Fox was fighting off the flock of pigeons with a laser sword, "Uh, Unikitty we have a small problem. I've encountered a flock of chocolate-eating pigeons who want to take a bite out of the balloon!" she said while swinging at the birds with her sword, "I'm going to be a little late!"
"Late? But what about Puppycorn?" Unikitty said while looking back at her brother, who was still flinging himself off the mountain.
Dr. Fox took another swing at the birds, "Just take him up the Ferris Wheel and I'll meet you up there! Doc out!" she said.
Unikitty put away her walkie talkie with a worried look, "If Puppycorn doesn't get his gift..." she thought as Puppycorn walked up next to her, all bruised and scratched.
"I don't think it's up there sis." he said.
"Oh, I just remembered! It's on the Ferris-" Unikitty started to say
"Ferris Wheel! Let's go!" Puppycorn cheered while pulling Unikitty along.
On the Ferris Wheel, Unikitty and Puppycorn's car reached the top, "I'm ready for the greatest Valentines gift in the world now sis." Puppycorn said.
"Yep, it should be here any minute now." Unikitty said, keeping an eye on the horizon for Dr. Fox. The seconds passed and Doc failed to show up, Unikitty started to get a little nervous. She secretly took out her walkie talkie and whispered into it, "Kitty to Doc, come in Doc."
Meanwhile, Doc was still fighting off the pigeons, the birds swarming the balloon, "Unikitty, I'm really in a big pickle here! I'm way off course!" she said while fending off the attacking birds by swinging the sword, "Take that! Get away! Pigeons are eating the balloon! They're everywhere!" At that moment, one of the pigeons pecked the balloon, causing a hole to form and the balloon to lose air and start falling, "We're going down Unikitty! Switch to plan B!" Dr. Fox shouted.
"What? No, no B Dr. Fox, no B!" Unikitty shouted before Dr. Fox's signal was lost. She then turned to Puppycorn, who was shivering with a look of impatience and excitement on his face, "Uh, Puppycorn, you know how sometimes you plan something special and things don't just work out?" she asked.
"Um, no... Whoa, is it hot up here or what!?" Puppycorn shouts while swinging the cart back and forth, causing the whole Ferris Wheel to shake precariously. Unikitty tried to calm her brother down as he was shaking the cart up and down while chanting 'Valentine' over and over.
"Wait, here it is!" Unikitty shouted while holding out her paw, causing Puppycorn to stop and look at it.
"What is it?" he asked.
"A pawshake a sibling pawshake." she explained.
"A pawshake? That's my gift? You got me a pawshake?" Puppycorn asked.
"A sibling pawshake. Happy Valentines Day!" she said. Puppycorn shook Unikitty's paw before staring at his own paw with a blank look, which gave way to a grumpy expression, causing Unikitty to laugh nervously.
The two of them continued to have fun at the theme park, going on rides, eating snacks, and going through a fun house. Unikitty was having a fun time while Puppycorn kept grumpily staring at his paw. Later in the day, the two of them were sitting on a bench. Puppycorn took a deep breath before addressing Unikitty in a serious manner, "I've been thinking. At first a handshake doesn't looks like much, but really it's the thought that counts-" he started to say before Craig came by with a chocolate box in her hands.
"Hello Princess, I've just-a wanted to thank you for this box of chocolates." she said.
"Uh, no problem Craig." Unikitty said before Craig walked off.
"And even though I was expecting more-" Puppycorn continued before he was cut off again by Dino Dude, who was holding some roses.
"Thanks for the roses Unikitty, Happy Valentines Day." he said.
"You too, Dino Dude." Unikitty said before he rolled away.
"And not that it matters that we've been siblings for so long-" Puppycorn was interrupted yet again by a random female minifigure with a bike.
"Hey Unikitty, thanks for the bike." she said before addressing Puppycorn, "Can you believe this girl? I just met her this morning." she said before walking off.
Puppycorn started to get irritated as he now gained an angry expression, "As I was saying..." he said before someone else interrupted them, a random Frown Town citizen.
"Excuse me, do you guys have the time?" he asked before Puppycorn picked him up and threw him away.
"PUPPYCORN NEEDS LOVE TOO!" he screamed before howling and running off, snarling as he did so. His rampage first brought him to a balloon cart, where he snipped off the balloons and destroyed the cart, causing the operator to run away. He then chases away some kids who were gathered around a smiling heart mascot, "I DEFY YOU HEART MAN!" he shouted before ripping the costume in half, revealing Brock underneath before running away while he stood there in shock.
"Attention Doki Diamond Fun Land visitors! A blue dog with a horn on its head is on the loose!" an announcement P.A. system said, causing everyone to run away screaming.
Puppycorn ran up to a swing ride with a big heart on top, "HEART ON STICK MUST DIE!" he said before trying to rip the ride out of the ground, giving up eventually while panting. He then spotted a little kid who was licking a heart-shaped lollipop and took it from them, causing them to scream and run away, "HEART ON STICK MUST DIE!" he repeated before snapping the candy in half and eating it.
"Puppycorn!" Unikitty shouted with a worried look on her face. Puppycorn turned towards her and all the other guests before snarling and coming towards them, causing the guest to run away.
Puppycorn eventually cornered them in a dead-end section of the park, where they cowered in fear, "GIVE ME UNIKITTY!" Puppycorn shouted. The crowd threw her out in front of him, causing her to give another nervous laugh, "You broke my heart! Now I'm gonna break something of yours!" he said.
"I know I am deserving of this Puppycorn, but... are they?" she asked, referring to the citizens standing behind her.
"They didn't give me anything either!" he said, prompting them to throw many Valentines gifts to him, "Nope, its too late for that now. For all of you." Puppycorn said with a menacing tone before stomping over the gifts. Unikitty cowered in fear as Puppycorn stood over her with a look of insanity.
At that moment, Dr. Fox rode in on the balloon, with it being pulled by the same pigeons that were attacking it. The balloon had been patched up and floating normally, "Yeah! Dr. Fox is here! Woo-hoo! Look Puppycorn, it's here! It's here! The best valentine in the whole wide world is right behind you!" Unikitty cheered while pointing at it while it landed behind Puppycorn.
"Sure it is." Puppycorn said sarcastically as he crossed his arms.
"I'm telling you little bro, its right there!"
"Nope!"
"Puppycorn, please just turn around." Unikitty begged, but Puppycorn didn't budge. All the citizens there angrily urged him to turn around.
"You must think I'm pretty dumb to you!" Puppycorn said.
"Yes! Turn around!" the citizens said.
"No!"
"Turn around! Turn around! Turn around!" the citizens chanted.
"That's enough! I'm gonna say this once and I'm not going to say it again, so pay attention. I am not, I repeat, not going to turn around for any reason...ever!" Puppycorn said.
"Hi, Puppycorn!" Dr. Fox said.
"Hi, Doc!" Puppycorn said while turning around and noticing the balloon, "But... I... it..." he stammered.
"Happy Valentines Day little bro!" Unikitty cheered.
Puppycorn gave a cheer of his own before running towards the balloon, "Woo hoo! My Valentine!" he said before climbing up, "Hey, is this solid chocolate?" he asked.
"Little bro, no!" Unikitty shouted.
Puppycorn bit into the balloon, causing it to pop and spray chocolate all over the theme park and the surrounding landscape, "Oh, sis. You didn't have to get me anything." he says.