User blog comment:Ghmorello/Chapter 919: Gotta Get Back! Back To The Past!/@comment-25400375-20180928120139

Sounds like Wano Country may have it’s own canonical version of the Rainbow Mist. Until we get more details, that’s the best explanation I have. If Kiku is involved in this, I’d take it she’s probably Kinemon’s student because I can’t see him being her actual boyfriend. Well, we’ll see how it goes.