you know what time it is.

I literally have to get up in 5 hours.

why is it that every time I actually NEED to sleep (due to needing to get up early for the next day), my body just rejects it altogether?

Idk for sure, this is just a guess, but maybe you realize how important the sleep is and that you need to “do it now!”. Because of this, you are putting pressure on yourself. Due to the pressure, you are not able to relax which makes it hard to fall asleep. If true, it’d be psychological and the solution would be finding ways to relax before sleep.

I'm staying up all night watching Isekai quartet

yep but I got shit to do (which includes schoolwork as soon as I get up, which takes around an hour, packing, etc) and you most likely don’t 🥲

its (my) weekend. so i get to have songs plauge my mind for longer!