Most of these are all idol stories.
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University story (I think? The main focus is about the game though...)
https://www.mangago.me/read-manga/raising_a_newbie_to_grind_them/
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Idol stories.
https://www.mangago.me/read-manga/i_became_the_cursed_idol_leader/
Reincarnation in the same world and there's a system. It's a pretty chill system I think? No romance as of now, only sismance.
https://www.mangago.me/read-manga/i_was_trying_to_debut_my_kid_but_i_ended_up_debuting_myself_grim_scans/
Regression and there's a system that's a bit annoying at times but mostly chill. No romance as of now, only sismance.
https://www.mangago.me/read-manga/debut_or_die/
The OG, the most popular, the MC that needs therapy, it's Debut or Die! One of the members actually gets speech therapy so you can look forward to that. Reincarnation story that takes place in the same world. I think there was a system and it probably wasn't annoying if there was one. No romance, only bromance.
https://www.mangago.me/read-manga/saving_the_doomed_idols_with_my_touch/
Reincarnation but still in the same world. No romance as of now. No system from what I can remember.
https://www.mangago.me/read-manga/manager_kim_hates_idols/
Regression story (kind of?). Annoying system that pisses me off non stop. No romance, at most bromance only. #Everyone needs therapy.
https://www.mangago.me/read-manga/i_became_the_youngest_top_idol/
A bittersweet story in my opinion. It's a regression kind of story. Not sure whether there is a system or not.
https://www.mangago.me/read-manga/monochrome_rumor/
BL story and there's no smut as of now. It's a reincarnation story that takes place in the same world.
https://www.mangago.me/read-manga/surviving_as_a_pd_idol_kyuzen_x_karinz/
A more cutthroat and "asshole-ish" MC. I love him so much as a character. It's so refreshing. It's a regression kind of story (it's a bit complicated) and there may or may not be a system. Not sure. There's no romance and only bromance.
https://www.mangago.me/read-manga/a_blank_slate_regression_for_the_idol_that_lost_his_original_mindset/
An "asshole-ish" MC. Extremely relatable, I would curse till the high heavens like him too. Annoying system that has some lore to it. Still hate the system though. It's a regression story and there's no romance, only bromance.

can someone please recommend me a manhwa or manga that takes place in university? and another one with an idol trope?