Janu receives a phone call from Kio, who, along with Oki, has become stranded after attending a disappointing college party in another city. Despite the distance, Janu agrees to travel to the station to escort them home. During the trip, Kio vents her frustration over the failed social outing and Eruka's sudden disappearance, noting that Oki is particularly shaken by the experience.
After Kio and Oki disembark from the train, Janu experiences a surreal encounter with a mysterious girl he previously met at a lake. She speaks in riddles and denies their prior acquaintance, mocking Janu's confusion and asserting that he cannot remain on the train. The encounter ends abruptly as Janu is seemingly transported back to the original journey, where he rejoins Kio and Oki. The group discusses mundane topics like movies, and Janu escorts them home. The event concludes with Janu feeling deeply unsettled by the mysterious girl’s lack of recognition and the strange, fragmented reality of his current situation.