excerpts from REPLAY! vol.01 by ふくたろう translated by me. 

(if you haven’t voted for it to be restocked on Toranoana please check out my recent) 

((I mean look at it who doesn’t want a whole anthology of this)) 

TL Note: Mio is surprised because referring to someone without an honorific shows extreme closeness to the person (Ritsu doing it also reinforces her personality and relationship with Mio)