Artist. Formerly tagged as Koutarou_(artist).
Japanese name: 小唄朗 (Koutarou)
The other names: 光太郎 (Koutarou) or こうたろす (Koutarosu)
Site name: farthest
https://www.pixiv.net/users/30063
https://www.pixiv.net/stacc/bonnemaa
https://sketch.pixiv.net/@bonnemaa
https://ririkarunanoha.tumblr.com
http://otarimu.blog.fc2.com
https://www.youtube.com/user/koutarosu1