E1 - Replaced

Aired: October 12, 2020

Osomatsu-san returns in an all-new family-friendly incarnation! Surely nothing will go wrong, right?

E2 - Dimwit Generation / Hatabou EATS / Let's Be Quiet at Night / Doctor T / Triangle Pop / Delivery

Aired: October 19, 2020

Choromatsu, Todomatsu, and Ichimatsu discuss their expectations for the show's third season. Hatabou struggles to deliver an online food order. The sextuplets harass a touchy couple. Totoko plays an awful but beautiful doctor. Jyushimatsu and Karamatsu hang out in a konbini and find a strange ad. Two robots powered by AI arrive at the Matsuno home.

E3 - Dimwit Generation 2 / Estimated Value / Magic Angel Magi Lunatic Ichi

Aired: October 26, 2020

Osomatsu, Karamatsu, and Jyushimatsu share their expectations for the new season. The Riceballs estimate the value of the sextuplets' friends, causing embarrassment. Magical powers are given to the wrong girl.

E4 - Ichimatsu Radio / Unit Formed / Matsuyo's Trap

Aired: November 02, 2020

Ichimatsu hosts his own in-home radio show. Totoko and Nyaa learn more about each other. Matsuyo punishes the boys for grabbing late-night snacks.

E5 - Well, Yeah... / The Way Home

Aired: November 09, 2020

Todomatsu and Karamatsu fall in love with a konbini employee and the boys go to a wedding.

E6 - Touter / Optimization / Massage

Aired: November 16, 2020

Iyami sells two salarymen short on a promiscuous shop. The Riceballs look for cats with Ichimatsu. Jyushimatsu gives Osomatsu a special massage.

E7 - Tidbits Collection 3

Aired: November 23, 2020

Another tidbits collection is here! Astronauts, yokai, and Governor Jyushimatsu await.

E8 - To the South / Mt. Takao

Aired: November 30, 2020

Dekapan and Dayon are drafted into a rousing aerial dogfight. Choromatsu takes the brothers on a day trip to Mt. Takao.

E9 - Sheeeh / Outfit / Let's Do Chores

Aired: December 07, 2020

The Riceballs try to understand the meaning of "sheeeh". Totoko and Nyaa try out new threads. The Matsunos do chores.

E10 - ZANSU / Werewolf

Aired: December 14, 2020

Passion and love are on full display in a SASUKE-esque physical tournament. The Matsunos partake in the deduction game "Werewolf", with twists and turns along the way.

E11 - Do it / Pizza

Aired: December 21, 2020

The Riceballs prove their worth. The sextuplets try to decide on hypothetical pizza.

E12 - AI

Aired: December 28, 2020

The Riceballs are replaced with another AI when they fail to do their job and the sextuplets go to look for them.

E13 - Mr. HNYmatsu

Aired: January 04, 2021

Salmon and Pickled Plum look back on the last two-and-a-half seasons of the series in a clip-show episode.

E14 - Pond Smelt Fishing / Mortal Combat / Sparkle Phantom Stream

Aired: January 11, 2021

Something mysterious is afoot during a fishing trip. A snowball fight breaks out. Choromatsu discovers something powerful.

E15 - Cosplaymatsu

Aired: January 18, 2021

Another collection of miscellaneous skits, featuring Ichimatsu as a pessimistic policeman, Chibita trying out a new gimmick for his cart, Osomatsu receiving the death penalty, and Choromatsu's miraculous reincarnation as a mosquito.

E16 - SaneCop / Nanmaider

Aired: January 25, 2021

Sanematsu has been resurrected to serve the public trust, protect the innocent, and uphold the law. Meanwhile, the sextuplets have become fully functional members of society, but Iyami and their father suspect something intergalactic at hand with the power of a strange pair of sunglasses.

E17 - The Riceball's New Routine / Imoni

Aired: February 01, 2021

The Riceballs test out some comedy material. Dekapan hosts an imoni-cooking competition.

E18 - Just Don't

Aired: February 08, 2021

Nyaa has a rather surprising crush that happens to be Osomatsu and literally everyone tries to stop her from making a terrible life choice.

E19 - Are They Disbanding? / Sumo Stable / Dogs

Aired: February 15, 2021

The Riceballs practice for the upcoming A-1 Grand Prix. A new recruit joins a sumo stable. Jyushimatsu and a dog switch bodies.

E20 - Choromatsu Memorial Hall / Ear Cleaning / Persimmons

Aired: February 22, 2021

The grand unveiling of the Choromatsu Memorial Hall is underway, with Todomatsu taking a tour. Osomatsu gives Karamatsu an ear cleaning. A terminally-ill Hatabou waits for the last persimmon to fall off the tree.

E21 - Is This Okay? / Greenroom / Totoderella

Aired: March 01, 2021

Choromatsu and Ichimatsu contemplate the meaning of "a long time" while hanging out at the konbini. The Riceballs converse with other competitors in the A-1 Grand Prix. Totoko plays Cinderella, falling for Prince Nyaa.

E22 - I Found This / Wanabe Detectives / Hide-and-Seek

Aired: March 08, 2021

Jyushimatsu finds a ¥100 piece. Oso and Juicy are two detectives whose dramatic skills are better than their investigative techniques. The sextuplets play a ludicrous game of hide-and-seek.

E23 - Contract Renewals / Shopping / Friend

Aired: March 15, 2021

The characters renew their contracts with the production committee, but the sextuplets have reservations about the season's success. The sextuplets go clothes shopping. Choromatsu meets with a high school friend, and reminisces about a dark secret they share.

E24 - New Osomatsu Returns / A-1 Grand Prix

Aired: March 22, 2021

After his arrest, New Osomatsu takes his revenge on the loser he replaced, culminating in a terrifying battle. The Riceballs perform their routine at the A-1 Grand Prix.

E25 - Bored

Aired: March 29, 2021

The sextuplets wander around town in search of things for sakura viewing, but...