In this episode, the characters explore or investigate ancient ruins, uncovering hidden secrets and relics from the past. The setting gives a mysterious and adventurous vibe, contrasting with the usual school environment. As they dig deeper, tensions rise, and clues about the larger mystery or the truth behind their current situation start to surface. Nana’s sharp intellect helps guide the group through potential dangers and puzzles, while also revealing more about the world’s lore. (thetvdb.com)