After the death of his pet cockatiel, Taishin Nakano remembers being comforted by university student Takara Shiga.

[10] The pitch that they wrote for the story described the boy as "[chasing] the person he wants to meet to the end of hell!

[10] On February 17, 2024, Viz Media announced that they would distribute the manga in English in both print and digital formats through their SuBLime imprint.

[11] An audio drama adapting Takara's Treasure was released onto CD by Shinshokan on July 28, 2023.

[5][1] Supporting cast members include Yui Mihara [ja] as Emiri Shinomiya, Ayaka Shimoda as Mei Hyōdō, and Kento Yamada as Kenzo Yukawa, Taishin's friends and classmates; Kazuya Asami as Akira Ishikawa, Yuri Kasama as Minami Uehashi, and Saaya Minase [ja], members in Takara's club; Gaku Sano as Masaya Yamagata, Takara's friend; Kazuyuki Matsuzawa [ja] as Hōei Shiga, Takara's grandfather; and Mari Nishio as Tomiko Nakano, Taishin's mother.

[17] The television drama adaptation is directed by Yuho Ishibashi, Miki Tomita, and Ryōma Kosasa.