Who drew the original?
>>15015056
"The “challenge” was inspired by the illustration of one notably naughty Pixiv artist: http://www.pixiv.net/member_illust.php?mode=medium&illust_id=58470507 "
source:
https://www.sankakucomplex.com/2016/11/30/one-finger-selfie-challenge-heating-up-nicely/
>>15015142
Thanks, Anon. Surprised to see that posting on /r/ actually worked.