E1 - I HATE YOU and I LOVE YOU

Aired: October 06, 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.

E2 - Neither Friend nor Slime

Aired: October 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.

E3 - Kawaii Puniru is a Slime

Aired: October 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.

E4 - Alice in Kyuthi Land

Aired: October 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!

E5 - GO! GO! Fabulous Cheer Routine!

Aired: November 03, 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.

E6 - The Runrune-tastic Grand Prix, Now with Puniru!

Aired: November 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.

E7 - Sweet Bitter Summer

Aired: November 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.

E8 - Gather 'Round for the School Festival!

Aired: November 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.

E9 - Let's Start a Band, Punks!

Aired: December 01, 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?

E10 - Merry Punirumas!

Aired: December 08, 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.

E11 - Scoop Up a Spoonful of Christmas

Aired: December 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.

E12 - A Lovely, Puniful Destination

Aired: December 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.

E13 - Puniru Returns

Aired: July 06, 2025

After Puniru goes missing in the middle of training to become cuter, Kotaro receives an unexpected package.

E14 - Going on a Journey with My Childhood Friend Slime in Another World. And Valentine's, Too!

Aired: July 13, 2025

Kotaro is hit by a truck and finds himself in a world of swords and sorcery. Puniru learns about Valentine's.

E15 - RUNE RUNE DANCE

Aired: July 20, 2025

When Runru breaks down one day, Puniru and Kotaro must find a way to have her repaired, but at what cost?

E16 - A Being More Perfect than a Toy

Aired: July 27, 2025

After a science lab mishap, Dr. Mado unveils his latest creation: a super-intelligent robot made of slime!

E17 - Puniru Powers Up?! See It for Yourself!

Aired: August 03, 2025

Kotaro has big plans for the summer, but could he be his own worst enemy? Meanwhile, Puniru seeks to power up.

E18 - A Human Happy Ending

Aired: August 10, 2025

Gelee becomes the center of attention among the school's boys, including Kotaro, much to Puniru's chagrin.

E19 - A Midsummer's Runrune Resort

Aired: August 17, 2025

Alice invites Kotaro to stay at Runrune Resort, but all Kotaro can think about is Gelee and her advances.

E20 - Episode 20

Aired: August 24, 2025

E21 - Episode 21

Aired: August 31, 2025

E22 - Episode 22

Aired: September 07, 2025

E23 - Episode 23

Aired: September 14, 2025

E24 - Episode 24

Aired: September 21, 2025