Both Chainsaw Man and Oshi No Ko are outstanding anime/manga with captivating content and appealing character designs. However, these two works have experienced different outcomes in terms of rankings. While Oshi No Ko quickly became the number one anime on MyAnimeList after its first episode, Chainsaw Man has been gradually losing its ranking.
Moreover, Chainsaw Man is currently facing challenges with DVD and Blu-ray sales, while Oshi No Ko boasts a strong profit margin and proudly stands as the most-watched anime in the spring 2023 season.

Despite these differences, it turns out that both Chainsaw Man and Oshi No Ko have a significant connection. Specifically, the author of Oshi No Ko has expressed a deep admiration for Chainsaw Man. This admiration even extends to the point where Chainsaw Man is referenced within the narrative of Oshi No Ko.
Yokoyari Mengo, the creator of Oshi No Ko, has had a passion for manga since childhood, even pursuing it as a career in her youth. Alongside Oshi No Ko, her creative work includes notable titles such as Scum’s Wish, Cigarette Anthology, and Kimi wa Midara na Boku no Joou.
Recently, the affection that Mengo-sensei has for Chainsaw Man has become increasingly evident, as she has incorporated her fondness for the series into her own work.
On August 30, 2020, the official Twitter account of Oshi No Ko posted a tweet revealing that the author was deeply moved when reading the latest chapters of Chainsaw Man.
This announcement was accompanied by a fan art of Power (a character from Chainsaw Man) created by Mengo-sensei herself. Through this, it can be inferred that Mengo-sensei’s feelings for Chainsaw Man are indeed profound.