The phrase roughly translates to: "The literally cool teacher fell into an ecstatic state (or got flustered) exclusively".
Note: This article is an original commentary. No copyrighted passages from the manga/novel are reproduced. genkaku cool na sensei ga aheboteochi exclusive
For fans of the series or those looking for database entries, you can find more information on: The phrase roughly translates to: "The literally cool
Given this, the phrase could roughly translate to something like: "The originally cool teacher's exclusive, admirable clumsiness." Mizuki’s cool‑factor drops after a public mishap
Anime (OVA): A two-episode series released in 2015 by studio Peak Hunt.
Without more context, I can offer a general response:
Examples from Anime and Manga