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“Iruma getting dodgeball execution cannonball flashbacks and knows just how screwed they really are.” Reddit · r/DemonSchoolIrumakun [DISC] Mairimashita! Iruma-kun Chapter 277: Opera-sensei

Chapter 277 of Mairimashita! Iruma-kun , titled , marks a major shift at Babyls Academy as Lord Sullivan's security devil, Opera, officially joins the school staff. The chapter balances emotional character development with the introduction of a new, high-stakes training arc for the Misfit Class. Plot Summary: A New Teacher Arrives The existing Babyls staff are largely intimidated by

Opera's new role serves multiple purposes—filling the gap left by the traitor Atori, keeping a close eye on the suspicious Shiida, and protecting the students while Sullivan is away at Babel Tower. who is rumored to be .

Students must reach the peak before their tea gets cold. officially joins the school staff.

The existing Babyls staff are largely intimidated by Opera's fearsome reputation. While Kalego is visibly distressed at the idea of working with them, the cheerful Robin is thrilled to have a "junior" (kouhai) to mentor—a dynamic Opera surprisingly seems to enjoy.

The chapter concludes by introducing the Misfit Class to Opera’s "hardcore" teaching style. Opera invites the students for a simple tea break, but there is a brutal twist: the tea is served at the top of a massive, smooth mountain peak.

Fans often highlight this chapter for its mix of comedy and the sheer power level of Opera, who is rumored to be .