Gotta get the jump before anyone else does! This actually had a .clip file (H026_b8編集用.clip) which I assume is either an accident of some sort or a bunch of frames. I'm not gonna download Clip Studio Paint just to open this. If you want it, here: https://mega.nz/file/ybonQYwK#ykavLf4J7SjzMmpSwPdZC9azZubT4NpPneBw_uXsBEQ