Although it's one of the tropes I hate "time travel can't change fate" is the safest version of time travel that doesn't basically instantly ruin any universe it's introduced into.
He can use time travel to save flowers, but not lives. Thus, flowers have no 'life'. Thus, flowers live yet...don't. Flowers are zombies, QED. Step on them on your way home, folks.
@RedOnYellow They don't feel secondary characters anymore. I think they are basically on the same level as Duke and Alice. Well they are only beaten by Alice and the Duke now. They slowly passed his little sister brother and Rob
I believe they're supporting role characters. They're not on level with the mc and heroine, but they're a factor in pushing the story.
I mean the Mc and the heroine IS the tittle of the manga.
Though I feel potential in the duke brother being the second Mc or antagonist. And the duke sister is just a side character or a supporting role too, if she gets kidnap that is.
Rob is also a supporting role, not sure about this but he might have seen him getting cursed?
Not an expert on telling who is what type of character. This is just my believe. Don't flame me lol.