Utsurun Desu.

伝染るんです。

An anime adaptation of Sensha Yoshida's Utsurun Desu. four-panel "nonsensical" gag comedy manga. The manga used a stable of off-the-wall characters to tell jokes that defied logic or reasoning. The original manga ran in Shogakukan's Big Comic Spirits magazine from 1989 to 1994. Source:ANN