Elegant Yokai Apartment Life, Volume 16 (Elegant Yokai Apartment Life #76-80)

His magical cover blown, Yushi steels himself to tell Chiaki-sensei about the grimoire. Vulnerable and braced for contempt, what the tender teen hears instead is a series of surprising anecdotes... In other news, preparations for the cultural festival are underway, and Tashiro and Co. have big plans for Chiaki-sensei regarding their class' booth. Everyone's amped up to make this last school festival the best one yet. That is, until some unexpected trouble stirs in class...