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The Matsunos are invited to Hatabou's birthday party. / Iyami discovers that his buckteeth contain a rare metal.
Episodes
1Osomatsu-kun Returns 2Let's Get a Job/The Melancholy of Osomatsu-kun 3Tidbits Collection 4Let's Get Independent/This is Totoko 5The Karamatsu Incident/ESP Kitty 6It's a Birthday Party, Dajo/Iyami's Great Discovery 7Todomatsu and the 5 Demons/To the North 8The Calming Osomatsu/Totoko's Dream 9Chibita and Oden/Jyushimatsu Falls in Love 10Iyami and Chibita's Rental Girlfriend 11Christmas Osomatsu-san 12Year-End Special-san 13Sanematsu-san/Girlymatsu-san/Accident? 14We Caught a Cold/Todomatsu's Line/Choromatsu-sensei 15Interview/Girlymatsu-san 2/The Life of Chibita's Flower 16Cat Cafe/Matsuno Max/The Ichimatsu Incident 17Jyushimatsu Festival 18Girlymatsu-san 3 / Iyami's Counterattack 19Period Drama Osomatsu-san/Choromatsu Rising 20Tell Me, Hatabou/School Matsu/Iyami's School 21Mahjong/Godmatsu 22The Star of Hope, Todomatsu/Final Sheeeh 23Kerosene/Dayon Tribe 24Totoko's Huge Panic/Letter 25Osomatsu-san, Such as It Was