Another manga that has really popped off on twt lately that is a super fun read is Idolatry by Shin Ootaka (artist Homare). It follows Junna Harumi, a die hard stan of the idol Tsukishiro Fuwari. After her oshi's group disbands and she deduces her fave will be part of an upcoming idol audition show (whose top 5 will get to debut), she goes through absurd lengths of net stalking to be able to boost Fuwari's odds of winning.
I want to be clear, Junna is def a bit of a creep (really just shy of a yandere since she's not very physically violent or in direct contact with her obsession) and the series doesn't shy away from that; she's ready to do just about anything if it means her fave gets the limelight she thinks she deserves. There's a lot of gap moe in her being cute and so utterly+earnestly love struck by Fuwari then turning around and blackmailing someone to get an inside guy for production.
In a competition with 99 other girls and skills of someone who's way too online (def NOT an idol), it's really interesting seeing Junna line up all the dominoes and knock it down for a big payoff. There's no doubt she's going to come up with some wildly convoluted plans during each stage of tryouts and more to get what she wants, it's only a matter of how far the author wants to push it.
That said, she's not the only crazy girl in the series. More idols get introduced once filming begins and the nonchalant #1 is quickly established as a very active menace in her plans.
Also it must be said but I love how Lisa's eyes are drawn. I'm pretty sure it's a stylistic choice and not representing smth like heterochromia but as a big fan of asymmetric character design I LOVE it. All our main idol characters have different designed pupils but her's just really stick to me--more is more is better imo so a quirky choice like this for the main rival is great!
If the actions of the mc put you off then I wouldn't pick it up hoping for immediate yuri (like with many mega idol fans, Junna mostly wants to see her fave succeed rather than get in a personal relationship for now). That said, if you want to see some ridiculous overplanning and micromanaging just to create the most opportunity for Fuwari to shine brightest, then this is def a great read.
It's a pretty short series (12 chapters translated as of writing this) so there hasn't been a ton of development just yet but it's def a fun series to keep an eye on!