https://www.pixiv.net/users/2170855
https://www.pixiv.net/stacc/ryo_takanashi
https://twitter.com/RyoT_Amane
https://twitter.com/Takanashi_Ryo
https://twitter.com/intent/user?user_id=160488288
https://twitter.com/intent/user?user_id=1206917019200708609
https://sketch.pixiv.net/@ryo_takanashi
https://www.pixiv.net/stacc/amanone-ryo
