@Kyuzo On page 9 the word "defeated" is misspelled. Kinda strange that they went in media res for this because I think it would have been fun to speculate what Sekai would do to defeat the monster. Thanks for the chapter.
@Hollow7F no, this happens 2 days after Sekai's return - meaning "present time". I'm guessing he gives up on attacking it himself, and goes to fetch the sword saint lol