Tenkai Knights Notebook Type Cases

Tenkai Knights Notebook Type Cases (Japanese: テンカイナイト手帳型ケース, Tenkai Naito Techō-gata Kēsu, Korean: 텐카이나이트 수첩 형 케이스, Tenkai Naiteu Sucheob Hyeong Keiseu) are notebook phone cases that were released under the Tenkai Knights product line in Japan in 2015 by Spin Master and ShoPro.