I honestly think it's not because of the grades that Nozomu hates Yuda, he didn't like how close Yuda was to Kiritaka and he was losing his control over Kiritaka because of Yuda, his possession. Kiritaka was showing indifference and defiance towards Nozomu and Nozomu didn't like that, it pissed him off and made Nozomu jealous of Yuda. Yuda also was erasing Nozomu and Kiritaka's history together and taking away Nozomu's sense of power by telling him to turn himself in to the police so he can have his history with Kiritaka back. Yuda was disrespecting him and Kiritaka in Nozomu's twisted perspective so Nozomu wants him dead. Yes, Nozomu probably wasn't happy that Yuda surpassed him on the top student chart, it's ridiculous to think that's the only reason why Nozomu is doing what he's doing.
Instead of bringing up his school grades, he should stick to the reason why he's with Nozomu in the first place, to get revenge for his friend. The joke is getting old already. I think Yuda is pretending to be indifferent towards Nozomu.
Yuda: you're a deeply jealous, narcissistic rich boy
Nozomu Okaya: you don't say? I think Nozomu knows what he is so I don't think he needs to be told it, the boy calls himself a cockroach and a demon all the time and he seems proud of it.
Yuda, this isn't the time to be bragging about your school grades, what a nerd lol. All what he talks about is having better grades than Okaya and wanting to take a test at the amusement park just to piss Okaya off. Is he trying to distract himself from his true feelings about Okaya?
https://www.mangago.me/read-manga/maria_no_danzai/uu/nml_chapter-76/pg-16/ Lol this part gives me second hand embarrassment, does Yuda think he's in a comic book? (⌒▽⌒)
Once the manga is finished this should get a anime adaptation and the mangas should get published in English as well.
I'm sorry but Yuda is acting like a insufferable quipster, dude you're making the crazy person angry stop...
I don't think Yuda is going to live, characters that act too confident and untouchable usually die.