Season 1
A white ermine, known in Japan as an okojo, Okojo-san lives at an exotic pet store run by a greedy manager until one day he escapes. In the chaos following, he ends up unconscious in a garbage can, where college student Haruka Tsuchiya finds him. Mistaking him for a ferret, Tsuchiya takes Okojo home with him. At the Shiawase apartment complex, Okojo meets other pets, including the gerbil Chorori, and the various eccentric human tenants. With his friends, Okojo struggles to adapt to life with humans, vacuum cleaners, and all the other things that come with human society. The comedy is largely reliant on absurdity and Okojo's tendency towards melodrama.
Okojo-san has arrived!/Okojo-san goes to the hospital
Okojo-san's Shiawase-sou adventure/Laughing Saeki
Okojo's grave/The enemy is a cleaning machine
Kojopii goes to paradise/Kojopii's campus life
Kojopii's secret/Kojopii vs Tacchin
Tachhin's tears/Kojopii's nightmare
Kojopii's makeover!/Kojopii in love
The fantastic hiking/Cosmos-hata's Tsukahara
Life with Kojopii/There is paradise in Kotatsu
Yuki, Yuuta and Karaage/Leader Okojo! Appearance Chapter
Choruri and Nezumi-dono/I like Kojopii
Battle! Christmas tree/Kojopii's Merry Christmas
Test for Leader Okojo!/Tsuchiya returns home
Chichi's memories/Kojopii, TV debut
Kojopii has been takened away
The mystery of the missing drawing/Choruri's happiness
Choruri VS Watabokori/Leader Kojopii! Battle Chapter
Hari-nezumi is high-class?/Mayumi's love letter battle
Mayumi's love letter battle/Save Itachi household!
Tsukahara, day of dreams/Leader Kojopii! Duty Chapter
Mystery of Ferret/Kojopii becomes a father
Let's grow it! Seed of dreams/Kojopii flies in the sky
Kojopii is trapped/Motemote's condition
Kojopii becomes wild
Leader Kojopii! Counterattack Chapter/Under the cherry blossoms
Okojo VS Okojo/Thy name is Kojuru
Kojuru goes to Shiawase-sou/Leader Okojo! New school term Chapter
Tsubame is being targeted!/Kojuru's favourite thing?
Ojuko and Granny/Leader Okojo! Hospitalised Chapter
Death match! Carp's streamer/I want to meet my idol!
Kagaku-kun's terrifying experiment/Leader Okojo! Teaching Chapter
Being a mangaka is tiring/Hide-and-seek competition
Miyu is a great trimmer?/Leader Okojo! Prosperity Chapter
The lost wild nature/Yearning of humans
I cannot say "Thank you"/Leader Okojo! Home visit Chapter
Kagaku-kun's second challenge/Okojo VS Mecha-Okojo
Kojuru and Choruri/Leader Okojo! Purchasing department Chapter
Mayumi's date battle/Tsukahara's Okojo cut
A wish upon a star/Leader Okojo! Pool Chapter
Kojopii's return of kindness/Mayumi's pair-look battle
Leader Okojo! Seaside School Chapter/Part-time Panic
Poolside crisis!/Tsuchiya dances in delusion
Colorful Kojopii/Leader Okojo! Guide to life Chapter
Tacchin, a start in love/Kojoru, why are you white?
I am Kojopii?/Hasegawa, afternoon times
Tacchin's love and hatred/Heart-throbbing panic
Yearning for Okojo/Leader Okojo! Summer holiday Chapter
Choruri's marriage/Mecha-Okojo's counterattack
I like you! Tsuchiya/Leader Okojo! Sports meet Chapter
Warm Kojoru/Leader Okojo! Finale Chapter
Shiawase-sou's Okojo-san