URLs

• https://www.pixiv.net/users/789403
• https://www.pixiv.net/stacc/kaitensiki
• https://twitter.com/tetsu_gai
• https://twitter.com/intent/user?user_id=1265844891407380480
• https://tetugai.fanbox.cc
• https://www.pixiv.net/fanbox/creator/789403
• https://sketch.pixiv.net/@kaitensiki
• http://blog.livedoor.jp/revolvesystem/
• http://1st.geocities.jp/revolvesystem/index.html