
https://www.novelupdates.com/series/debut-or-die/
idk which the og commenter used but on novel updates.com, it has up to chap 200

I used multiple sources:
https://drive.google.com/drive/mobile/folders/11slBf217J1yGl7ic2STeo3GxMtXTmLw0/10yilkFfugGWkSg620nKCQ7aSd7Vjm_JU?utm_source=en&pli=1&sort=13&direction=a - a very good fan translation for chapters 220 to 425
https://m.webnovel.com/book/debut-or-die-(chapter-64-)_31150826700254405 - I believe this is a secondary website but I found it the most convenient. It has early chapters and uses the translations from the google drive link above. It starts at chapter 64 which is somewhere around the end of the first season/beginning of the second season. Unfortunately I don’t know who translated 64-200 but would like to credit them.
https://daotranslate.com/series/debut-or-die/ - this one has all of the chapters but the translation is poorer
There is no non-machine translation for chapters 200-220. As for chapters over 425 I think there are some people working on proper translations but I haven’t gotten a look yet. I think it’s a good idea to try novelupdates as well (you need an account to access links though, so I haven’t tried myself).
I have to say it was waaay too addicting. I’m taking a break now but I was at chapter 250 and could not believe how it only kept getting better. I already liked all the characters but somehow I managed to love them even more.
I think I had the biggest change of heart towards both Sejins. I didn’t pay much attention to Sejin A but reading his story from the beginning and following his (very slow burn) character development in the novel all I can say is that he’s a badass.
As for Sejin B, I found him slightly annoying in the manhwa but now I love him so much. It’s not any single moment but the way he doesn’t seem like he’s thinking about anything on the outside but is actually very observant and emotional on the inside. And also the way he cares for Moondae so much is so sweet to me (same with Sejin A).
I also already really liked Moondae, but I somehow managed to love him more later on. The way he’s smart but the story also shows his thought process so it’s realistic, and the way he can still mess up by overthinking because he’s desperate to survive and complete all his missions with the same members he has now (he cares about them more than he thinks he does).
As for the rest, it will be too long to explain, but basically I just love all the characters way too much now lol. I want to read the rest but also I don’t want it to end. I guess I’m lucky I’ll be a bit busy soon so I can take my time.