It's the BULLYING that Eiji kept secret from her along with only finding out LATER about everything from the teacher as they gather the evidence! Kondo and Miyuki are IDIOTS for being SO FUCKING PUBLIC since guess what
A Foodie Streamer was nearby that night in chapter 1, heard Kondo's loud fucking mouth among the other commotion and had his camera on the trio! No words were heard, however the video CLEARLY shows next to Kondo "HITTING" Eiji unwarranted, proving he LIED about laying a hand on him along with Miyuki also exposed as lying cause GUESS WHAT! Eiji never grabbed her on her wrist....KONDO DID as the video showed, meaning his "I didn't see or no nothing" is also proven a lie!
Seeing her son's "humilation" and be HARMED, and ALL because Miyuki had to be a Slut! Ms. Aono.....REGRETS letting Miyuki off with a "Stay away from my family" earlier and wished she had STRANGLED her instead back then! Next to the Fact the Teacher gets a copy of the Stream, which goes on among MANY OTHER THINGS leading to the EXPLUSIONS of Miyuki and Kondo! As me and others said previously! Miyuki SQUANDERED her last chance to tell the truth, and what was funny in the end was, she didn't even do ANY of this for KONDO like she kept LYING she was doing it for out of guilt for getting involved, even THAT was a lie! SHE was just scared of losing her reputation if it came out she cheated on Eiji, and acknowledging later that losing Eiji meant that REPUTATION was pointless so she wrecked his life to save ONLY HERSELF! Just another level of her SELFISHNESS. I do like that it wasn't MALICIOUS Selfishness at least. Just idiotic at worst and refusing to accept responsibility. "Crime doesn't pay indeed' LOL
But Ms. Aono, on Eiji's behalf as his mother and Guardian, she files a police report and plans on SUEING BOTH KONDO AND MIYUKI! Over the assault back in chapter 1 in Kondo's case, and the Slander and Conspiracy in Miyuki Case & ESPECIALLY Kondo's as well! THIS leads to the police following up, and Kondo like the LOSER COWARDLY SMUG SNAKE THAT HE IS "Running away" when they show up at the school for him and getting his ass arrested cause THEY ONLY CAME TO QUESTION HIM! If he had kept his cool, they'd have left after questioning him and that would be it, but well a DATE later with Miyuki that I think is UPCOMING here in the Manga will SHOW "Just how BRAVE Kondo is when things aren't working in his favor! He's smug because of a sense of invincibility, but show A CHINK and he will panic and show how much of a LOSER he really is) This just starts the FUSE on disproving the lie that Kondo was "a big hero who protected Miyuki from her creepy EX BF Eiji" since seeing him being carted off and later Miyuki and the Soccer Club being called in again after that affair with Kondo's arrest (and Eiji's award that happened RIGHT as that arrest happened mind you, since Kondo ran and got arrested near the award, ALOT of students witness it) starts destroying the narrative! And if Kondo wasn't a "good guy hero" then "What did happen!"
The Second INTERVIEW and as said Miyuki panicking when questioned by the other students WHY she's being called back in and her cracking and begging forgiveness is the DEATH KNELL as now EVERYONE IN HER CLASS and the SCHOOL EVENTUALLY discover she and Kondo CONSPIRED against Eiji and LIED! Eiji WASN'T the "creepy Ex BF Stalker" he was painted as, and he starts being seen instead as "The poor loyal BF who was betrayed by his GF who cheated on him, who after getting caught, in fear of being exposed, CONSPIRED with Kondo her affair partner to frame EIJI as the bad guy of the whole ordeal" While that's not 100% the truth as Miyuki was POINTLESSLY irrelevent once she choose to remain SILENT when the mess started (giving WEIGHT to the lie). This only WORSENS her REPUTATION LOSS she feared as again, "keeping quiet" destroyed ANY CHANCE once the truth came out for her to save herself once it DID come out!
Kondo is lucky that both being held (that arrest I mentioned), Expulsion (don't come BACK, especially after what his father pulls later trying to bribe the Principal which doesn't work and unlucky him a reporter had witness his outburst and actions so that starts HIS RUINATION, which will effect HIM later on) and Juvie mean he doesn't have to SUFFER the Consequences of being exposed as a Piece of Shit (What Eiji had to go through because of him, yeah he'll still be talked about BADLY and anyone who cares to remember him will only remember him as a scumbag who stole a good model student's girlfriend then conspired with her to lie on said student to frame HIM as the bad guy! So he will always be seen from that point on as a Scumbag), He'll ESPECIALLY need to avoid his old minions in the Soccer Club who get EXPELLED AND THE CLUB SHUT DOWN for their part in helping him by target Eiji for bullying! Not a single one is INNOCENT (even if they claim like Miyuki's female friend who helped them, Ritsu who also is getting expelled for helping THEM that they didn't know Eiji was innocent, as the GOOD TEACHER will retort that as he said at the START once he noticed Eiji's desk and the bullying, "they had no RIGHT to take matters into their own hands!" and he is right on that, they did it for their OWN satisfaction and hopes of getting him to quit school on his own cause they thought THEY had the right to do so, not caring if he WAS innocent or not!). Even the TEAM CAPTAIN who as you saw in HIS interview before Miyuki previous chapter, "LIED" about not noticing anything going on, he WAS aware of Kondo's bad behavior INCLUDING how he co-opt the Club Members into his personal minions!
The Dude was SELFISHLY focusing on his own "University Propsects" that he COULDN'T MUSTER getting Kondo under control, or even LETTING the Coach know what was going on because he assumed it would just get in the way of his FOCUSING on his future and LET the scumbag do as he pleased! He may not have been WORKING for Kondo like the rest, but his inactions and willful neglect was MORE then enough to AID in his corrupting the club for his wrong doings!" Making him just as responsible (and putting him in the same position as Miyuki as he LIED about not knowing in his interview when he should have fessed up, and making himself look WORSE when he decides "okay I'm fessing up now!" as he misses the point that it's too late now, ESPECIALLY since now the Club is ruined and will be shut down, making what he did and his PROSPECTS pointless because of the disgrace the club suffers AND his own expulsion) Suffice to say Kondo best never run into ANY of his FORMER PEONS as they made it CLEAR in their own rants that for ruining their future (even though it was STILL their choice to believe and follow Kondo's lead so equally their own faults) they plan to "bust him up if they ever see him!" And the loss of his FATHER'S STATUS AND MONEY and being a NOBODY NOW means Kondo's in for a WELL DESERVED BEATING SOME DAY! (Especially since they do target Ritsu! Who was also expelled for her part in helping them who they also blame despite the fact she helped THEM because they asked for her help and at the time because she was on her KAREN RAMPAGE on Eiji trying to "avenge Miyuki" like a blind fool, they worked together, but I swear, everyone who sided WILLINGLY with Kondo and Miyuki suffer "never my fault syndrome" as Ritsu isn't even SORRY herself for how she treated Eiji, she's only sorry that she was WRONG and getting into trouble for her actions! Teacher calls her on this as Ritsu's pride refuses to let her see what she did WRONG, basically she doesn't think she was "wrong" for "protecting a friend" which comes off more she's mad she was WRONG on the money, not on the act itself Even Ai calls her out on this when she tries to FORCE an apology unto Eiji since she knows apart of her aggression was more "she was RIGHT about Eiji" and it took direct "yeah no" for her to be in the wrong, so she really ISN'T sorry for her actions!)
But Miyuki isn't so lucky and has to deal with "what Eiji went through" only WORSE and WELL DESERVED that even SHE can't feel sorry for herself when she remembers she ABANDONED Eiji to this which he never deserved! She went from "innocent girl next door" to "A slut who will let ANYONE do her" (Not true as she only did it with Kondo, but well, what you'd expect girl, siding with another man and painting your BF and childhood friend as a creep will do that!) SPOILER]