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.
01. Okojo-san has arrived!/Okojo-san goes to the hospital
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02. Okojo-san's Shiawase-sou adventure/Laughing Saeki
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03. Okojo's grave/The enemy is a cleaning machine
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04. Kojopii goes to paradise/Kojopii's campus life
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05. Kojopii's secret/Kojopii vs Tacchin
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06. Tachhin's tears/Kojopii's nightmare
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07. Kojopii's makeover!/Kojopii in love
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08. The fantastic hiking/Cosmos-hata's Tsukahara
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09. Life with Kojopii/There is paradise in Kotatsu
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10. Yuki, Yuuta and Karaage/Leader Okojo! Appearance Chapter
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11. Choruri and Nezumi-dono/I like Kojopii
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12. Battle! Christmas tree/Kojopii's Merry Christmas
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13. Test for Leader Okojo!/Tsuchiya returns home
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14. Chichi's memories/Kojopii, TV debut
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15. Kojopii has been takened away
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16. The mystery of the missing drawing/Choruri's happiness
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17. Choruri VS Watabokori/Leader Kojopii! Battle Chapter
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18. Hari-nezumi is high-class?/Mayumi's love letter battle
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19. Mayumi's love letter battle/Save Itachi household!
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20. Tsukahara, day of dreams/Leader Kojopii! Duty Chapter
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21. Mystery of Ferret/Kojopii becomes a father
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22. Let's grow it! Seed of dreams/Kojopii flies in the sky
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23. Kojopii is trapped/Motemote's condition
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24. Kojopii becomes wild
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25. Leader Kojopii! Counterattack Chapter/Under the cherry blossoms
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26. Okojo VS Okojo/Thy name is Kojuru
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27. Kojuru goes to Shiawase-sou/Leader Okojo! New school term Chapter
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28. Tsubame is being targeted!/Kojuru's favourite thing?
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29. Ojuko and Granny/Leader Okojo! Hospitalised Chapter
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30. Death match! Carp's streamer/I want to meet my idol!
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31. Kagaku-kun's terrifying experiment/Leader Okojo! Teaching Chapter
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32. Being a mangaka is tiring/Hide-and-seek competition
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33. Miyu is a great trimmer?/Leader Okojo! Prosperity Chapter
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34. The lost wild nature/Yearning of humans
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35. I cannot say "Thank you"/Leader Okojo! Home visit Chapter
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36. Kagaku-kun's second challenge/Okojo VS Mecha-Okojo
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37. Kojuru and Choruri/Leader Okojo! Purchasing department Chapter
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38. Mayumi's date battle/Tsukahara's Okojo cut
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39. A wish upon a star/Leader Okojo! Pool Chapter
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40. Kojopii's return of kindness/Mayumi's pair-look battle
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41. Leader Okojo! Seaside School Chapter/Part-time Panic
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42. Poolside crisis!/Tsuchiya dances in delusion
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43. Colorful Kojopii/Leader Okojo! Guide to life Chapter
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44. Tacchin, a start in love/Kojoru, why are you white?
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45. I am Kojopii?/Hasegawa, afternoon times
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46. Tacchin's love and hatred/Heart-throbbing panic
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47. Yearning for Okojo/Leader Okojo! Summer holiday Chapter
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48. Choruri's marriage/Mecha-Okojo's counterattack
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49. I like you! Tsuchiya/Leader Okojo! Sports meet Chapter
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50. Warm Kojoru/Leader Okojo! Finale Chapter
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51. Shiawase-sou's Okojo-san
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