>>716291742K's song was kino tho
But yeah, it was a very weird event. My only complain about it is Mori's bond being completely disconnected from the event story and Siren's advises which are a fucking crime
Aside from that I can see why people didn't like it (aside from the yuri shitposting). Unlike the past events which are flashbacks and Last Kingdom (which is more like "meanwhile in this other place") Unbreakable sphere was a continuation of 2 different side stories + old tales
To truly appreciate the event you need to also appreciate Mihara and Yuni's story, which start in chapter 3 and end in chapter 24, and then continue on Wordless. Also you need to read both old tales and Mudfish. It was just a lot of stuff going on in one event
Also the devs saying that Siren was a "perfect" character is just wrong. The only "perfect" character was Crown, because the crown you see at the start of LK and at the end of LK are the same (both her personality and her mentality, physically she's just naked)
I did liked the event story, I do think it's better than Last Kingdom even, but the overall experience of the US event (not only the story but the whole update) wasn't that good. Also it's reaaally hard to compete against OverZone (in half Anniversary) or Old Tales (the previous big event)
At the end, Grave keeps winning tho. And that makes me happy :^)