I can second @Crank@ani.social's recommendations of Journal with Witch, Mushoku Tensei and

for Oshi no Ko vibes.

I find that the following dramas give off somewhat similar vibes too:

• Ave Mujica (can be watched as a standalone season)
• Beastars
• Erased

In my opinion, it's gonna be hard to find something close to OnK. It mixes some elements that are hard to find together in other works. The closest thing I can think of is Perfect Blue.

There are some other shows that come to my mind, but they only share similarities with some aspects of OnK, not all of them.

If you liked the insight into the entertainment industry, you might like Shirobako, or Showa Genroku Rakugo Shinju if it was the performing arts that caught your attention.

If you liked the dramatic take on

If the main thing that caught your attention were realistic human interactions, then you might find some of these interesting, even though some of them are completely different thematically:

• A Silent Voice
• Journal with Witch
• March Comes In Like a Lion
• Look Back
• Mushoku Tensei

If it was the

Frieren

Chainsaw Man

The Apothecary Diaries

Kaguya-sama

Jujutsu Kaisen S2 and later

The Fragrant Flower Blooms with Dignity

Bocchi the Rock - maps most closely to OnK S2. Little to no drama

Re:Zero

Dandadan

Takopi's Original Sin

Rascal Does Not Dream of Bunny Girl Senpai