Author is a woman, by the way.
I'm guessing by the 106th chapter or so she began to realize there isn't really that much more she could do to extend the story to explore the already strenuous connection between the ouendan club hijinks and the time travel, so she decided to outline an ending...
@idle_af
I took it as both brothers having some sort of hero complex where they want to be seen as the ultimately good person by taking the blame for stuff and becoming the figurative villain, this was foreshadowed among other things by the flashback to Taji wrecking a bunch of his classmates...
Author even lampooned himself by having Ezaki say in-universe that Tachibana-san would be an asspull if he was a character in a work of fiction. Glad it's finally over, but what a meh ending:
1) the reasons why Masato refuses to see Taji are not really explored, and Masato instead is shown to...
Based Adam the Allfather.
And before some boomer fedora tipper misses the point of the joke (and the manga) again, everyone knows we evolved from chimps.
Calling it now Atsushi will win the vaccinebowl without so much as wounding a single one of Akira's party members and then betray Miyabi at the very last second, only for Miyabi to pull something else out of his ass and escape again