So after some hours to think about this chapter honestly, what the fuck just happend, first of all, why does Agawa began to act like her early volumes self? sometimes I wish that Takeda wasn´t so atached to Gotou´s pov but anyways lets hope that we do get an answer, in the meanwhile I have some theories:
a) Agawa had an ephiphany: The severity of which ranges from, after everything that she came to realize over the past days Agawa steeled her resolve and regained her once lost confidence to she kinda just broke like Gotou did in the summer arc and reseted herself to her factoy settings.
b) Agawa is acting: Now, I am not implying that she is doing this maliciusly, on the contrary, I belive that she is just acting tough for Gotou´s sake even if she is dying inside, maybe to give him security to open up, which , if true, is working.
c) Takeda´s bad writing: In particular I think he wrote himself into a corner with Agawa and Gotou´s relationship and because of that he rolled back Agawa´s character.
As for Agawa´s i´m an idiot too, speech?, i think she did 3 things, and, I feel in very Agawa fashion, she did it in a very sublte way.
1) She kept apologising to Gotou, thats why she said the "I can´t judge others" line, which to me implies that she did judge Gotou for his actions but she realizes that she has also done the same things so its a pot calling the kettle black situation.
2)She is trying make Gotou relate to her, her whole story about thinking about Gotou´s word about sex as something that is purely for reproduction, taking birth control, but then proceed to have sex 10 times anyways is esentially what Gotou has been doing since Agawa gave him ED, he thinks about it but proceeds to have sex anyways.
3) She is signaling that her lesbian phase is over, so she had sex 10 times but if she is a lesbian why the fuck would she take birth control or any form of contraceptive at all (unless it turns out that Erika was trans all along or some shit like that) , also of course, the fact that she is trying to seduce Gotou.
Speaking of which I don´t belive Agawa´s story, like, after school, thought about Gotou´s words, went and bought birth control pills, and then proceeded to fuck like crazy?, aroud 10 times, and still wants more?, even if she fucked the same dude that is insane even for a slut like Agawa, but lets asume that indeed happend, in theory Agawa herself has already stablished that when she fucks to much she comes late to school, but she noticed that Gotou and Kume were late so I feel it is implied that she went to school on time, there is the possibility of her fucking on school grounds but Agawa stoped doing that since volume 1 since it was too risky, and yes I am aware of her sex scenes with Erika but scene number one they were just making out and scene number two happened in the school festival, a lot of students and teachers were consentrated in some areas in particular leaving others unsupervised and honestly they were making out again but this time they were also masturbating each other, no scissors, no eat eachother, like what they did was really tame and if someone cached them they could just bursh it off as just making out instead of having sex. As of why she would do this? I feel the reason why she could lie about this is my point 3 of the previous argument.
As for what could come next, honestly I wish that at least they don´t fuck in the library, if they pull the we cached you having sex plotline again I will be dissapointed, I feel that there are some plot lines that could still be adressed by author and some scenes that could happen like, seriously the only girl in a bikini we see in the entire manga is Shina, I guess Agawa had an ilustration but that is the bare minimum, acording to many maybe we still have volumes 11 and 12, im thinking more like it will end on something like volume 15 maybe but honestly I dunno, guess will just have to wait and see. But anyways these are just my theories and interpretations so take them with a grain of salt.
Also according to the ES translation team Takeda is taking a week off (yes again, maybe he should make this manga bi-weekly) so we will know in 14 days lmao.