JK x Onaka #2 is a Japanese adult doujinshi illustrated by Mignon and published by Mignon Works in 2020. Mignon's artwork has developed a strong international following, and professionally graded examples of the artist's limited-print books seldom appear on the secondary market.

This copy has been professionally graded CGC 9.8 White Pages and currently stands as the Single Highest Graded example recorded, making it particularly desirable for CGC Registry collectors and fans seeking the finest certified copy available. Unlike mainstream comics, Japanese self-published works often have relatively small print runs and rarely survive in high grade, making top-population examples especially difficult to replace.