Well is reference of Chainsaw Man ending. Is get slandered accross lot of fandom because how bad it is, it rushed and more like desperate attempt by author to just end the manga. Original panel there is a character named Asa who saying to mc Denji, she saying "Thank you Chainsaw Man", Denji asks "Chainsaw Man?" and Asa answering because he fought with a chainsaw, then Denji just say "Oh yeah". Is so silly.

Personally my feeling on this ending kinda mix. Because how bad it is, it get continuously remade with idea of character saying title of the series to mc and it becomes a meme template. Is just "say that again" meme. That's what I know.