https://twitter.com/kabaoer
https://www.pixiv.net/users/56168860
https://weibo.com/u/7480210655
https://pome.vip/5Yx7mqLE
https://space.bilibili.com/2567219/

The artist created multiple Twitter accounts in the past, and also changed his Twitter handle multiple times as well. However, only one of them survives now. At the time of writing, he deleted almost all his artworks from Twitter (not the first time it happened) and his Pixiv account is currently empty. You can still check some of them in his Weibo account. Listed above are all his active social media accounts.

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 on 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 - 163: Twitter (the names correspond to their publishing date)
164 - 243: Pixiv
244 - 342: Weibo

Update 1: Added 62 from Twitter.
Update 2: Added 19 from Twitter, 14 from Pixiv and 94 from Weibo.
Update 3: Added 9 from Twitter, 1 from Pixiv and 2 from Weibo.
Update 4: Added 4 from twitter and 5 from Pixiv.
Update 5: Added 3 from Twitter and 3 from Weibo.

草，卡老师

Base +5, Catherine De Laserre +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