第24話: アラレは睡眠中に誤ってコオロギを飲み込んでしまい、劇的な性格変化を起こす。

24

A cricket jumps into Arale's mouth while she is sleeping. After she eats the cricket, she becomes a different girl. Now, she is very calm and very serious, so everybody starts to worry about her. (Source: Wikipedia)