In Episode 9 of Mushoku Tensei: Jobless Reincarnation Season 2, the episode begins with Sylphie, also known as Fitz, and Rudeus discussing their observations about teleportation and summoning. Fitz mentions that he knows a summoning specialist named Silent Sevenstar who has made significant contributions to the school.

When Rudeus arrives, he meets a girl named Nanahoshi Shizuka. At first, Rudeus is afraid of Nanahoshi because she is under the protection of Orsted, who nearly killed him during their last encounter. Nanahoshi reveals that she is also from Earth, but unlike him, she was not reincarnated—she was teleported. She has been in this world for five years and does not age. She has traveled the world with Orsted to gather data for her return and to search for two people named Shinohara Akito and Kuroki Satoshi.

Nanahoshi believes that if her work is successful, she can logically explain the mass teleportation. For this, she needs a large amount of mana, which Rudeus can provide. They agree to collaborate, and Rudeus expresses his trust in Nanahoshi to Fitz.

The episode ends with Rudeus and Fitz acknowledging their mutual trust, laying the foundation for their future work together in upcoming episodes.

Nanahoshi explains that she and Rudeus are "foreign entities" in this world and that altering history could lead to their erasure. She has zero mana and researches magic circles to find a way back to Earth. She proposes a deal: Rudeus assists her with her experiments in exchange for information.

During their conversation, Nanahoshi hints that the mass teleportation incident might have been a reaction to her arrival in this world. Fitz, who had accompanied them, becomes angry at this revelation and blames Nanahoshi for the suffering caused by the mass teleportation. Eventually, however, they come to the realization that both of them are victims themselves.