Now On Booth: Ring Of Fire Quarterfinal #1! (Patreon)

https://booth.pm/en/items/3164390

"First match in an 8-woman tournament to challenge the current champion! 13 pages, 45 images, PDF Format."

The cost is 500 JPY, or around $5 USD. It's also currently available for Patrons in the $5 tier. Once all 4 quarterfinal matches are completed, a collected edition will be posted on my lulu.com bookstore.