At this point, even if I was a novel reader, I dont know what to expect. The manga basically went and had its own other half plot.
This is the webnovel.
https://www.novelupdates.com/series/tate-no-yuusha-no-nariagari/
I mean, I guess you can say that, though webnovels have a different writing and shit, they are close to light novels, but it still is called canon, its just that there will be no confirmation if the writer changed the story or not. Not to take literally, but there are some that are literally the same, its just in online format, so the one I've been reading is quite unconfirmed. But another word is that, the manga also changed before it took itself to the 30s prolly so everything can actually change midway.
Wait...I see a lot of people hoping that Yoshino would just dump Kirishima at some point. Am I the only one who sees that as boring? I like the whole love/hate fiasco going on and they match each other since the lived nearly the same lives and come on, in this business, it's true that people can't really marry freely, it's like that one big corporation where the owner just force the heir to fall in love with a girl whom he grew up with since they had the same lives.
Even with no dialogues, narrations or one day one day, this shit is funny and their dumbass cant be portrayed any better unless with this