URLs

• https://www.pixiv.net/users/265956
• https://www.pixiv.net/stacc/youhei_1985
• https://twitter.com/tetrapod1985
• https://twitter.com/intent/user?user_id=32584014
• https://sketch.pixiv.net/@youhei_1985
• http://tetrapod.weebly.com
• http://tetrapod.weebly.com/illustration.html