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On the novel updates forum, there's a spoiler post where it mentions that there is an amnesia arc in the side stories. It apparently is once they already have two children. However, I have not read the novel and there's some people saying that doesn't happen Atp I don't know, but the forum is the root of the information.

chat i’m so confused ppl r saying there’s an amnesia arc but then there’s ppl saying there’s not will there be one or not