^Presumably this mangaka also sees Sensei as the top given on the last page they call it EnamiTokura :)
I too can't see it any other way - Eiko is cheeky with Sensei and teases her - which is tons of fun since Sensei is a bit Tsundere, but we see any kind of contact or familiarity from Enami gets Eiko super flustered :) And that is really cute given how assured and mature she often is.
I know right? That's exactly why I ship them that way <3
I expect a lot from this author, and it makes me happy there's already a Kiyose x Eiko tag. I can't wait to get more fanart and doujinshi as well!