SPOILER
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So there will be more of the arcs. Because the author comes back to all of them to write their different endings. Reason is because after he does all the worlds we get a flashback on how he dies in his orginal world and who he originally loved and he finally gets closure and then the system asks him whether to come back to the real world or go back to one of the worlds before and continue his life there. There are multiple endings which means one chapter he chooses to come back to the mermaid arc and he finishes his life there and another he chooses to come back to the zombie arc and continue his life there. So dreams do come true I guess LOL ¯(ツ)/¯
Wow.. I love multiple endings for this type of stories. Coz I can't choose only for one world to get happy ending..
I want more of the zombie one ╥﹏╥
But sadly it'll never happen
Dreams are meant to be crushed.