So basically, their arm wrestling with vice-prez only was a half success as Gakuto was only able to install the recovery program but not enough time to actually recover the e-mails. Then they pretty much gave up afterwards as they thought there was no other way to prove their innocence. And then on the second last day, they were given the resignation forms to fill out. Meanwhile Hana from cutting her mushrooms finally recalls what really happened in the nursing room
, which made her determined on getting her revenge on Kiyoshi.
On Kiyoshi's form he wrote "I know what you hid in the backyard", which made the principal concerned and gave them a chance to talk to him privately, in which they got to postpone their deadline for another day. And so they finally came up with a plan. They notified Chiyo to go near their prison in the evening and Kiyoshi was able to use Hana's hatred on himself to lure her to get back on him. Hana started threatening him when they were alone, and her "revenge" was to steal his first kiss from the girl he loved. Kiyoshi decided to go out and started french kissing her
, which made her half unconscious and in the midst of all this chaos, he was able to let Chiyo and Gakuto switch places with each other.
The next day when everyone gathered in the principal's room, because Gakuto and Chiyo switched places, Gakuto finally had the free time to fully recover the e-mails to prove their innocence. Ends up the 3 members of the shadow student council got suspended for now and the guys are finally back to their normal lives.
Which I think is the end of this really long arc, not really sure where the author is going to go with this from now on.