 If you liked Kaguya-sama wa Kokurasetai: Tensai-tachi no Renai Zunousen |  ...then you might like Renai Daikou |
It's basically another Kaguya but with different characters from the same author. Unlike Oshi no ko it's a rom-con again, very similar to Kaguya, but I feel like the characters have a potencial to be better written because the author is more experienced now. Please make it more popular it's very good so far!