The volume 1 extras can be found here: https://www.mediafire.com/file/t9wnnv434ve6tzl/
Or read online at MangaDex.
The volume 1 batch can be found here: https://www.mediafire.com/file/cfdxq7u9r6e5xwj/
Please note that numbering of the chapters has changed to match the table of contents in the tankoubon release.