Official Taiwan Traditional Chinese edition of Define the Relationship Vol. 4, also titled 定義關係 4.

Artwork by CHADA, script by Haeyon, and original story by Flona. This is the standard paperback edition published in Taiwan by Pinsin Studio / 平心出版. It is not the special-edition box set.

This volume features Taiwan-edition cover artwork by CHADA, along with bonus pages containing four-panel comics and special illustrations. The original OBI/belly band shown in the photos is included.

Language: Traditional Chinese only. No English or Korean translation is included.

ISBN: 978-986-494-984-7

A great addition for collectors of Korean BL manhwa, Omegaverse stories, BOMTOON titles, and international-language editions.