https://twitter.com/かつき
pixiv→ http://pixiv.net/users/550517
ポイピク→ https://poipiku.com/7631593/
BOOTH→ https://katsuki27.booth.pm/
とらのあな→ https://ec.toranoana.jp/joshi_r/ec/cot/circle/2UPA1B6Q8675d46pd687/all/