Isekai wa smartphone to tomo ni. season 2 episode 10
Episode title: Amnesia and the Mystic Eye of Petrification
Touya rescues a girl in the forest, and while the technology of the Alchemy Ward is able to completely heal her, her memories remain lost and she's unable to remember her own name and how she got so injured. At her request, Touya names her Sakura.
