Little is documented about who first recorded Pledu, so its history is mainly an online one. The clip circulates on soundboards under its short name, built around the German phrase Hallo liebe Schüler, a standard way for a teacher to greet pupils. Because the wording is simple and the delivery reads clearly as a classroom welcome, it travels easily between edits, chats and short videos, where users drop it whenever a scene turns into a lesson, a lecture or an unwanted school moment.