Breaking it down: Kansai Enkō (関西暗号 One) probably refers to something related to Kansai, which is the region in Japan including Osaka, and maybe "Enkō" here is a pun or a play on words. Then Mami Chū 1 (真美中 1) could be a name, with "Mami" (真美) being a girl's name and "Chū" (中) meaning middle or middle school. The 13 Sai Shōjo (13歳 少女) is straightforward: 13-year-old girl. Soushitsu (素体) might mean "base body" or "main body," and Install is just the English word here.
Breaking it down: Kansai Enkō (関西暗号 One) probably refers to something related to Kansai, which is the region in Japan including Osaka, and maybe "Enkō" here is a pun or a play on words. Then Mami Chū 1 (真美中 1) could be a name, with "Mami" (真美) being a girl's name and "Chū" (中) meaning middle or middle school. The 13 Sai Shōjo (13歳 少女) is straightforward: 13-year-old girl. Soushitsu (素体) might mean "base body" or "main body," and Install is just the English word here.