Well you'll see in the next chapter if really didn't resist... (keep in mind that many readers checked the raws)
He's way too confused to be able to consciously give consent anyways, it's pretty obvious he has no idea what is going on (at this point he's not sure if this is real or fantasy).
Coercion: "The action or practice of persuading someone to do something by using force or threats." is a form of abuse and when pentration is involved in abuse it's called rape. The legal definition of rape is basically: abuse involving sexual penetration, period. Rape doesn't necessarily involve drugging someone or having a knife to their throat... In most cases not saying anything and being passive is a frightened/confused "no".
Okay, i'll have to wait till the next chapter then and see how the uke handled all this, i can't really say, based on ch 3 alone, that it was rape. I just cant, i'm sorry. I actually know the definition of coercion and used it here on purpose, the coercion was to get the uke to masturbate not to have sex with him, so at the very least, if the sex really WAS rape, he wasn't coerced into that, but the masturbation. I used "coercion" because the seme persuaded the uke into masturbation with the threat of leaving. Hence me saying, coercion, plain and simple. It fits the word by definition. Now, the issue with saying "well, he was coerced and then penetrated" is the METHOD through which he was coerced and the lack of force applied during the sex as well as the lack of resistance. He was just threatened "that he'd leave", that's it. It was the uke who placed importance in these words and decided that masturbation was a better alternative. This is consent, plain and simple. HE told the seme not to leave, out of the self-interest of him NOT wanting the seme to leave, while under the understanding that if the seme stayed he'd be agreeing to "let the seme watch" as those were the words said aloud. Sure, it left the uke confused, but if it was JUST confusion and not disgust/rejection of what was happening then it was just coercion to masturbation, then the uke getting swept into sex via his delusions and the semes advances, i think the idea was that the seme was making(?) the uke imagine everything that he was saying, hence him being so shaken. How would you feel if you were a guy imagining a girl as per your usual only to suddenly be bombarded with vivid gay fantasies? Of course he wasn't calm. I think people are mixing up this "shock" with "rape" and a lack of consent. I guess there're 2 missing factors here for me to view it as rape: 1. I need to know how his delusions effect him, are they kinda like a slip from reality and leave him unable to fight back or was he back the moment the seme was done dirty talking and was pulling up his shirt to touch his nipples and show the uke that "delusions and reality are very different". If he was kinda incapacitated the entire time by his delusions while the seme was making him see things about them, then i'll say it was rape. If his delusions make him kinda out of it then ihe wouldn't have had the mental clarity to consent to the sex and in this case the shock might be an indication of no consent being given. Similar to drunk sex, specifically the kind of drunk where the person can't think rationally, i actually believe in consensual drunk sex if the person is just tipsy and actually wants it. 2. Like i said, i REALLY need to see how the uke feels about it after, if he's just fine then it wasn't rape, if he scarred and wants the seme out then it was rape. It IS possible he'll kick him out just for some time alone to think, so mood here really is the key.
he didn't give consent. he didn't fold in to kirishima's request to masturbate in front of hime (something he also did NOT want to do) with the expectation of being fucked by the bastard.
He consented to the masturbation, then when Kureshima was dirty talking to him during his delusion he said "i'm starting to feel like last time", as in he just said he was getting horny. "last time" was the delusion ending in a footjob from Kureshima. You're right though, he didn't expect to be fucked, that's why he acts so surprised. Kureshima is a bastard, you're right here too, he should've properly prepared Oono's ass, when he thrusts in it makes Oono yell. 1st time anal is pretty painful, let alone with no condom and using spit as lube... Maybe he thought he had to be quick so Oono wouldn't have time to think about it too much and get out of the mood? I'm assuming the only reason he was even able to enter that way is because Oono got really horny.
He consented and was swept away... He never even said stop, just "wait". He said himself that he'd let the guy watch him masturbate, then got swept away by the seme's advances... It was just sudden so he looked a little panicked. I could agree with "coercion", but not "rape". He did hold leaving over the uke's head to get him to masturbate, but there wasn't really any force involved.