Episode 1
I HATE YOU and I LOVE YOU
Oct 6, 2024
Puniru follows Kotaro to school to take him something he forgot, but they end up getting into a fight. Puniru turns into an idol to get Kotaro to admit she’s cute. Kotaro tries to enlist Puniru’s help in winning the affections of his crush, Kirara-senpai.
Episode 2
Neither Friend nor Slime
Oct 13, 2024
Kotaro asks Puniru to turn into a first grader and act lost so he can look good in front of Kirara-senpai, but little does he know Kirara’s maternal instincts go into overdrive around children. Puniru later plays a trick using this knowledge.
Episode 3
Kawaii Puniru is a Slime
Oct 20, 2024
Kotaro’s favorite plushie as a child was the adorable Kyuthi-chan, which had a profound (jealous) effect on Puniru. Now he wants to go to the Kyuthi Café, where he gets Puniru to pretend to be his girlfriend so he can order a dish meant for couples.
Episode 4
Alice in Kyuthi Land
Oct 27, 2024
Alice, granddaughter to the president of the toy company that made Kyuthi-chan, challenges Puniru to see whether she or a character Alice created is more adorable—and you could say the competition gets blown into gigantic proportions!
Episode 5
GO! GO! Fabulous Cheer Routine!
Nov 3, 2024
In an attempt to please Alice, Hodai dons a Runrune costume. Meanwhile, Nanpa, Puniru, and Hone-chan fight over Robo Runrune. Then, to put some pep back in the exhausted Kirara-senpai’s step, Puniru and Runrune become cheerleaders.
Episode 6
The Runrune-tastic Grand Prix, Now with Puniru!
Nov 10, 2024
Puniru gets moldy and down in the dumps when Runrune starts ignoring her. Later, she’s determined to get Runrune and Alice to be friends again. Next, AI Runrune hits the scene, and Alice and Puniru face off to see which Runrune is better.
Episode 7
Sweet Bitter Summer
Nov 17, 2024
Kotaro and the boys go to the beach for a day of fun while Puniru and Kirara-senpai are at the school pool. Later, Kotaro asks Puniru to help him cool off with a special transformation, the gang hits a café, and then it’s time to tackle summer homework.
Episode 8
Gather 'Round for the School Festival!
Nov 24, 2024
It’s time for the school festival, but Puniru and Alice get into a fight over Kotaro. Alice tries to win him over with an incredible offer, and Puniru tries to throw the match so he can pursue his dreams.
Episode 9
Let's Start a Band, Punks!
Dec 1, 2024
Kotaro wants to be cool and decides to try his luck with dragons and a rock band. Puniru then lets the cat out of the bag about Kotaro’s feelings for Kirara, which forces him to make a move. Can he get Puniru to help him out?
Episode 10
Merry Punirumas!
Dec 8, 2024
Ever since being teased as kid for liking cute things, Kotaro has never enjoyed Christmas. This year his parents are going on a trip for the holiday, so in order to avoid being stuck home alone with Puniru, he tries to throw a Christmas party.
Episode 11
Scoop Up a Spoonful of Christmas
Dec 15, 2024
Puniru says she’ll spend the holiday with whoever brings her the cutest Christmas cake, but the offerings she gets are... interesting. When a certain someone loses their patience, she may yet get a Christmas to remember.
Episode 12
A Lovely, Puniful Destination
Dec 22, 2024
Out of the blue, Kotaro wins tickets to a ski resort—specifically the Runrune Resort run by Alice. When they get there, Puniru is determined to make an impression, and her desire to be cuter than ever may just spur even greater adventure.
Episode 13
Puniru Returns
Jul 6, 2025
While hoping for Puniru's return, a lonely Kotaro sees the fruits of her cuteness training from afar. One day, he receives an unexpected package.
Episode 14
Going on a Journey with My Childhood Friend Slime in Another World. And Valentine's, Too!
Jul 13, 2025
Finding himself transported to a fantasy world, Kotaro learns he must rescue Princess Kyuthi, who has been imprisoned in the Demon Lord's castle.
Episode 15
Rune Rune Dance
Jul 20, 2025
After Runru breaks down, Puniru decides to inject it with some slime-based medicine that has an unexpected side effect: awakening its sense of self.
Episode 16
A Being More Perfect than a Toy
Jul 27, 2025
Mado succeeds in creating an artificial slime lifeform and names her Gelee. Wanting to become more human, Gelee begins searching for someone to love.
Episode 17
Puniru Powers Up?! See It for Yourself!
Aug 3, 2025
Kotaro has big plans for the summer, but could he be his own worst enemy? Meanwhile, Puniru seeks to power up.
Episode 18
A Human Happy Ending
Aug 10, 2025
Gelee becomes the center of attention among the school's boys, including Kotaro, much to Puniru's chagrin.
Episode 19
A Midsummer's Runrune Resort
Aug 17, 2025
Alice invites Kotaro to stay at Runrune Resort, but all Kotaro can think about is Gelee and her advances.
Episode 20
Trick or Kawaii!
Aug 24, 2025
Gelee joins Kotaro's class as a student, to her chagrin. Meanwhile, Puniru plans a big surprise for Halloween.
Episode 21
Art Is All About "Kawaii"!
Aug 31, 2025
Hodai hatches a scheme to discredit Kotaro in Alice's eyes by having him face Nanpa in an artistic face-off.
Episode 22
Friendly Enough to Always Argue
Sep 7, 2025
Kotaro gets into a big fight with Puniru, who runs away to Mami's apartment and meets the Kirara family.
Episode 23
The Human Condition
Sep 14, 2025
Kotaro holds a study group with friends, but his careless remark to Gelee ends up having dire consequences.
Episode 24
That's What the World Calls Love
Sep 21, 2025
Puniru turns into a perfect human girl, but Kotaro doesn't seem as happy to hear the news as everyone else.
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