Lool i relate so much to watching anime/kdramas instead of doing my work 😅
I just finished my a levels and i stopped using tiktok for a month (after realising i was literally spending 24 hours a week on it).
Sometimes u just have to disipline yourself. Ask yourself -- is it really worth watching Xo Kitty when you could be sacrificing a higher GCSE grade?
As someone who just finished year 13, i've seen people lose out on uni offers because their GCSE grades were not high enough (top schools care about GCSE grades too). So i know i sound harsh but you need to make a choice for yourself.
Since you're addicted, i suggest quitting watching kdramas and anime for the rest of your GCSEs since they take up alot of time. Keep watching normal shows that you aren't extremely invested in as a substitute.
When you are ready to learn, use the app FLORA. It tracks the amount of time you revise per day. For example, i did 8 hours last thursday and then 2 hours last Friday. This way, you'll know exactly how many hours you're sacrificing everyday and actually want to work harder.
Good luck for the rest of your exams -- i'm happy to answer more questions on anything.