Hey there!
I myself did some digging and found that the author canceled their contract with the original publisher this making it unavailable. The full jp raws can be found thru his pixiv fanbox for 500 yen a month.
https://hibikimio.fanbox.cc/posts/5753133
the Chinese character is actually 手 shou (hand) but is changed into 扌so It can become a character that is added onto different words such as 挑 tiao (pick/scoop). Other characters that are like this is 足 zhu (foot). This character is changed into the left part of 跑 pao (run). 口 kou (mouth) 吃...