|Yuuko offers a broccoli as an apology to Mai.|
|Romanized Name:||Nichijou no Dai-san-wa|
|English Name:||Nichijou Episode 3|
|Directed by:||Hiroko Utsumi|
|Written by:||Jukki Hanada|
|Original air date:||April 18, 2011|
Yuuko Aioi gets the feeling that Mai Minakami is mad at her and tries to apologize in various ways, only to find out she was wearing headphones. Meanwhile, Nano Shinonome and Hakase find a black cat and name it Sakamoto. The Professor makes a special scarf which allows Sakamoto to speak, although he ends up speaking in a rather condescending tone towards the two. Yuuko has an arm wrestling match with Mai only to lose repeatedly to the latter.