Heaven official's blessings or jujutsu kaisen

Okay so now after a few years, I've managed to save enough for making a purchase of few books.

Now I'm in this moral dilemma where I have to choose between buying complete tgcf volumes OR Jjk volumes. Jjk is teeny tiny bit more expensive but still in my budget and I want both of them SO FUCKING BAD.

And mind you, I've read them both online but still. My lil bro (10 years old) is hyping me for Jjk and my lil sis (16) is hyping me for tgcf I'll fucking cry, they are no help.

Also I have a bond with tgcf on spiritual level so if you tell me not to buy that I'll cry. But then again, I want Jjk too????? Aahh????