QED iff 証明終了 加藤元浩 [1-21巻 コミックセット/未完結] Complete first edition, first printing issued on August 9, 1997. Despite being 27 years old, it remains in exceptional condition with its original glossy cover and minimal spine fading. No bent corners or major scratches, with only slight age-related wear on the page edges. Smoke-free and pet-free, with no unpleasant odors. Early first-print manga editions have recently gained attention overseas as vintage collectibles, and copies in this condition are becoming increasingly rare and valuable. 青山書院 幸せを育てる教育まんが 5冊セット 昭和48年~50年発行