If you absolutely need a PDF for offline archiving, buy the EPUB from Kobo or J-Novel Club and use a free tool like Calibre (with DeDRM plugin for personal backups) to convert to PDF. This keeps your copy legal for personal use.
Since the anime ends at volume 6, here is a non-spoiler look at the content exclusive to the PDFs you might be hunting:
Kokoro Connect Light Novel Pdf (2027)
If you absolutely need a PDF for offline archiving, buy the EPUB from Kobo or J-Novel Club and use a free tool like Calibre (with DeDRM plugin for personal backups) to convert to PDF. This keeps your copy legal for personal use.
Since the anime ends at volume 6, here is a non-spoiler look at the content exclusive to the PDFs you might be hunting: kokoro connect light novel pdf