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This book uses funny story plot to think from the angle of a child. It starts from find younger sister's peepee to solve the questions of the difference between girl and boy and the difference of their reproductive system. All is to bring a relaxing sex education class.
| メディア | 書籍 Book |
| リリース済み | 2018年10月19日 |
| ISBN13 | 9789864139880 |
| 出版社 | ????-???? |
| ページ数 | 36 |
| 寸法 | 150 × 220 × 20 mm · 204 g (重量（概算）) |
| 言語 | 中国語 |
