Artist, illustrator, mangaka.
Pen-name: 古閑 裕一郎 (Koga Yuuichirou)
Nickname: わいけい (Wai Kei)
https://www.pixiv.net/users/1838581
https://www.pixiv.net/stacc/gunsonicrevolver00
https://twitter.com/doritosu3300
https://twitter.com/intent/user?user_id=277599959
https://www.deviantart.com/waikei7777
https://seiga.nicovideo.jp/user/illust/4923791
https://www.nicovideo.jp/user/4923791
https://tli3qacf.fanbox.cc
https://www.pixiv.net/fanbox/creator/1838581
https://sketch.pixiv.net/@gunsonicrevolver00
https://www.tinami.com/creator/profile/18020
https://www.facebook.com/waike.waikei
https://piapro.jp/doritosu
http://www.mangaupdates.com/authors.html?id=20436
http://ja.wikipedia.org/wiki/古閑裕一郎
https://waikei777777777777.jimdo.com
