Kanna's hidden ability awakens after learning about static electricity!? The distorted love of Rukoa's younger sister goes on a rampage towards Shota-kun! And then, Toru begins special training with Elma heading towards the "Trial Grounds"! In that flow, they end up fighting three boss-level opponents!? What does Kobayashi-san think of Toru, who is trying to become stronger...? A story of humans and dragons who have taken time to bridge their unfamiliarity, Volume 15!!