The link to the english version:
http://www2.ocn.ne.jp/~warz/Giantess60e.html
If you like I recomend everyone this links
http://warzwars.ifdef.jp/GTS64_1.html
http://warzwars.ifdef.jp/GTS64_2.html
http://warzwars.ifdef.jp/GTS64_3.html
It's the illustration he did for a story(sorry japanese only), thanks to Watari001 for his translation's work there are many artwork he translate in english. I hope you'll enjoy them