As both were written by Aka Akasaka, the author decided to put connections between Kaguya-sama and Oshi no Ko, making the two series take place in the same world.
Recently he has also started publishing a new manga called “Love Agency” which has also been confirmed to be set in the same world.
This post will show the connections between Kaguya-sama and Oshi no Ko, whichever ones are at least clearer and indicative of taking place in the same world.
What is Kaguya-sama and Oshi no Ko about?
Kaguya-sama is a romantic comedy story that features a “battle” between geniuses Shinomiya Kaguya and Shirogane Miyuki to get the other to confess first.
Oshi no Ko is a cute series about a doctor who finds out that his favorite idol, Hoshino Ai, is pregnant at the age of 16.
But are there really connections between Kaguya-sama and Oshi no Ko?
Yes, because in a publication on August 26, 2021, Aka Akasaka said that the two manga take place in the same universe, Oshi no Ko takes place a few years after Kaguya-sama and all the characters like Kaguya, Miyuko, Iino, Ishigami etc are older.
— 赤坂アカ 集英社作品 総合アカ (@akasakashueisha) August 26, 2021
Now, the Connections between Kaguya-sama and Oshi no Ko!
The Sweet Today Manga
Starting with the most obvious, we have the manga “Sweet Today”, he first appears in the second season of Kaguya-sama and is the reason why everyone in the student council ends up crying.
Chika gives spoilers for the series and at the end of the episode of Kaguya-sama we even have all the characters in a shoujo anime style, with totally different artwork and even a new theme song!
Already in Oshi no Ko, that is, a few years after Kaguya-sama, the same manga appears, having been picked up to be adapted into a live-action drama and who plays the role of the protagonist is the actress Arima Kana.
The Shiranui Sisters
At the end of episode 4 of Oshi no Ko we have the introduction to a new character actress called Shiranui Frill, who has very flashy and beautiful eyes:
Shiranui Frill is the younger sister of a character appearing in Kaguya-sama named Shiranui Koromo. Just like Frill, Koromo is also part of the entertainment industry.
She hasn’t appeared in Kaguya-sama’s anime yet since her first appearance is only in chapter 211 of the manga, so we have to wait for new seasons of the anime to see her animated.
Kaguya appears in Oshi no Ko
How about a stronger connection than this one? Kaguya herself appears in the Oshi no Ko manga, however she appears in a special chapter of a few pages, where Kaguya, now working as a photographer, takes pictures of Ruby.
It is also revealed that Kaguya is now called “Kaguya Shirogane”, showing that she has married Miyuki.
Ruby in Kaguya-sama
In chapter 276 of Kaguya-sama, which takes place in the future and focuses on Hayasaka, it shows her passing by a place that shows Ruby and Kana as idols:
This chapter is said to be just Hayasaka’s dream for the future, but it certainly takes place in the future.
And well, these are the connections between Kaguya-sama and Oshi no Ko, at least the clearest connections we have, there are still other small references to something that a character says and that makes sense for the other work.
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