The four Classic Club members go on a hot spring trip, which Eru plans. They stay in an inn that belongs to Mayaka's relatives. They are greeted by Mayaka's cousins, Rie (older) and Kayo, and their family. Eru mentions that she too wishes for a sibling. After having a dip in the hot spring, Hōtarō gets dizzy and is helped back to the inn by Satoshi. Later, everyone (except Hōtarō, who is still feeling sick) starts telling ghost stories...