1 I HATE YOU and I LOVE YOU
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.
★ 8.5 2 Neither Friend nor Slime
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.
★ 10.0 3 Kawaii Puniru is a Slime
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.
★ 10.0 4 Alice in Kyuthi Land
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!
★ 10.0 5 GO! GO! Fabulous Cheer Routine!
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.
★ 10.0 6 The Runrune-tastic Grand Prix, Now with Puniru!
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.
★ 10.0 7 Sweet Bitter Summer
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.
★ 10.0 8 Gather 'Round for the School Festival!
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.
★ 10.0 9 Let's Start a Band, Punks!
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?
★ 10.0 10 Merry Punirumas!
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.
★ 10.0 11 Scoop Up a Spoonful of Christmas
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.
★ 10.0 12 A Lovely, Puniful Destination
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.
★ 10.0 13 Puniru Returns
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.
14 Going on a Journey with My Childhood Friend Slime in Another World. And Valentine's, Too!
Finding himself transported to a fantasy world, Kotaro learns he must rescue Princess Kyuthi, who has been imprisoned in the Demon Lord's castle.
15 Rune Rune Dance
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.
16 A Being More Perfect than a Toy
Mado succeeds in creating an artificial slime lifeform and names her Gelee. Wanting to become more human, Gelee begins searching for someone to love.
17 Puniru Powers Up?! See It for Yourself!
Kotaro has big plans for the summer, but could he be his own worst enemy? Meanwhile, Puniru seeks to power up.
18 A Human Happy Ending
Gelee becomes the center of attention among the school's boys, including Kotaro, much to Puniru's chagrin.
19 A Midsummer's Runrune Resort
Alice invites Kotaro to stay at Runrune Resort, but all Kotaro can think about is Gelee and her advances.
20 Trick or Kawaii!
Gelee joins Kotaro's class as a student, to her chagrin. Meanwhile, Puniru plans a big surprise for Halloween.
21 Art Is All About "Kawaii"!
Hodai hatches a scheme to discredit Kotaro in Alice's eyes by having him face Nanpa in an artistic face-off.
22 Friendly Enough to Always Argue
Kotaro gets into a big fight with Puniru, who runs away to Mami's apartment and meets the Kirara family.
23 The Human Condition
Kotaro holds a study group with friends, but his careless remark to Gelee ends up having dire consequences.
24 That's What the World Calls Love
Puniru turns into a perfect human girl, but Kotaro doesn't seem as happy to hear the news as everyone else.
