Hōtarō, to the Classic Literature Club's surprise and concern, becomes interested in his past teacher's changed feeling towards helicopters and his apparent survival of three lightning strikes. Eru is curious about Hōtarō's interest and tags along with him to do some research at the city library. Hōtarō remembers his sister telling him that the weather across the mountains is quite different from that of the city, meaning that the lightning story is plausible, though unlikely...