Utsurun Desu.
Alternative Titles
Utsurun Desu., Alternative : 伝染るんです。, Contagious, Utsurun desu, Utsurundesu.
Genres
Synopsis
From Wikipedia: This manga is deemed to be one of the works that initiated the "irrational" or "unreasonable" gag comic genre where the reason of its funniness cannot be explained by logic and traditional sense of humor, which made this title very popular among teens and early twenties at that time.