Party For You

Mirio stood in the kitchen, covered in streamers, sweat, and far too much frosting.

He glanced around at the mess—colorful paper fans, a slime-resistant cake stand, and a very questionable birthday hat shaped like a blob. A banner hung over the entryway, handwritten in glitter pen:

"Happy Birthday, Lily!"

Of course, he didn't know when Lily was born. She'd just… appeared one day. Slid into his bathtub. Smiled at him. Claimed his heart.

So he picked a date at random.

He had no idea if she'd care.

But she cared.

She really cared.

The moment she oozed out of the bathroom and into the kitchen, wearing nothing but her oversized raincoat and a flower crown made of jellyfish-shaped petals, she froze.

Her big green eyes locked on the banner.

Her body wobbled.

And then she melted into a puddle on the floor.

"Wha—hey, wait—Lily?!"

Her gooey form shimmered with color—blue, pink, yellow—all swirling together like icing in a blender. She reformed moments later, now slightly shorter, her body softer, rounder, and glossier. Her tentacle-hair curled like ribbons. Her cheeks were flushed purple with emotion.

She blinked once.

Then rushed him.

"Ah—!"

He didn't even have time to brace himself before she wrapped around him, her chest squishing against his face, her arms molding to his back like hot slime hugging cold skin. She vibrated softly against him—like a living purr—and buried her face into the crook of his neck.

"Surprise," he mumbled into her chest.

She pulled back just enough to look at him, her eyes sparkling with something intense.

Then she began to shift.

Her body bubbled and softened, arms retracting, legs dissolving. Her hair tentacles curled around themselves, forming swirled loops like piped icing. Her breasts puffed into round, jiggly tiers. Her torso fluffed up with pastel colors, her skin shifting to a smooth cake texture with a glossy sheen of jelly-like coating.

She had turned herself into a cake.

A literal slime cake, shaped like herself—complete with decorative tentacle frosting, fruit-slice eyes, and a perfectly molded Mirio-shaped topper sitting on her top layer like a cherry on top.

"…I don't know whether to hug you or light a candle on you," he whispered.

Her icing eyes blinked.

She shifted again.

The cake moved, arms forming from its sides, and suddenly she was a full-bodied, squishy version of herself made of layered slime-cake, arms wide open.

He knelt down.

She collapsed into his lap.

Her gooey weight molded perfectly to his body, wrapping her sticky, sugary limbs around his waist, her chest now soft enough to squish like flan. One of her cake-frosting nipples poked his chin. He didn't mention it. She was vibrating with joy.

"You really liked it that much, huh…" he muttered, brushing her forehead.

She nodded slowly, then leaned in, pressing her forehead to his chest.

Then her mouth opened.

"Love you."

His heart skipped a beat.

She rarely spoke. And when she did, it was simple. Honest. And devastatingly sincere.

Mirio hugged her back, arms sinking into her sweet, jiggly form. She smelled like sugar and fresh water. Her inner glow shimmered through the frosting. One of her tentacle-hair strands gently wrapped around his wrist, holding it like a party streamer.

He stroked her cheek. "You want your gift?"

She tilted her head.

He held up a small box.

Inside was a necklace—simple, silver, and enchanted. It sparkled with a faint blue charm shaped like a droplet.

"So you can always remember," he said, "even if you don't have a real birthday… this one is yours now."

Her eyes welled with tears.

Not water—actual emotional tears, gleaming pink and purple, sliding down her cheeks like jelly. She cupped his face with two gooey hands, then leaned in and kissed him.

Sweet.

Cool.

Sticky.

Her frosting lips coated his mouth in sugar, but it didn't numb him. Not this time. This was pure affection—love given shape.

When she pulled back, her body quivered—melting slightly again, her form flattening into his lap as if her joy was too much to contain.

"I'll take that as a yes," he whispered, running his fingers through her soft, cake-textured slime hair.

Outside, a neighbor's dog barked.

Inside, Lily pulsed with warmth and sweetness, humming softly, glowing from within.

And Mirio held her close, covered in frosting, lost in the warmth of a slime who loved him enough to become his cake.