Exchange Tag acquired.
「引替札」を入手しました。
101Leafy researched the game with the Hilltop Works fan translation patch, English translation by Cargodin

Exchange Tag is item 11 of the game's item table, in the Items group. The script names it on disc 3.
Lines of the script that name it, each with a link to its place in the script.
Exchange Tag acquired.
「引替札」を入手しました。
Item table: Three Keys Exchange Tag Magic Cards
English translations by Cargodin for Hilltop Works Fan Translation Patch: https://www.patreon.com/hilltopworks/posts/kowloons-gate-160555525?collection=18503