Arupa-san not only created multiple Twitter accounts in the past, but also changed their Twitter handle as well. At the time of writing, only one of his Twitter accounts survive (there are massive deletions from time to time though), his Pixiv account is currently empty, and he opened a new Weibo account (the old one is nowhere to be found). His active social media are:

https://twitter.com/kabaoer
https://www.pixiv.net/users/56168860
https://www.weibo.com/u/7868510637

In addition, some of his artworks can only been seen on AKUZIHS1-san social media (listed below). She is a novelist who has been commissioning art from Arupa-san; she later uploads some of them to her Twitter & Weibo accounts (with the artist's permission of course).

https://twitter.com/AKUZIHS1
https://www.pixiv.net/users/5853342
https://weibo.com/u/1879541327

From newest to oldest.
1 - 173: Twitter
174 - 253: Pixiv
254 - 370: Weibo

草，卡老师

Base +5, Catherine De Laserre +6, 127soge +6

老师画得太棒了，狠狠地爱了

Base +3

P111怎么是佐伯&侑&灯子😮
这个三明治的夹心是我没想到的

Base +4, TheHubbard +6, totto053 +6