・What is it?
ROBF is an Ero Doujin battle game created by アスガル騎士団 (Asgar Kishidan).

・Where can I buy it?
On DMM (Membership Required).
on DLSite (No Membership Required).

The creator of ROBF is working to make his games available on more English platforms. He’s also looking to set up a Bitcoin tip jar for those who prefer cryptocurrency. This information will be added when available.

・I already downloaded this for free. Why the hell should I pay this guy?
The Long Version:

TL;DR: Recently, copies of ROBF started getting passed around on 8chan, causing the creator to go on a fruitless DMCA takedown spree. Attitudes towards software and the internet being very different between Japan and the West (for various reasons) this lead to misunderstanding, and hostility.

After we reached out and explained the benefits of treating foreign users as potential customers instead of pirates, he agreed to take steps to make his work easier to access for overseas fans. If the positive steps made by Asgar Kishidan are met with increased sales, it would set a positive precedent that would encourage more Doujin artists to open up to their overseas fandoms. Also, if you enjoyed the game, wouldn’t you rather he felt motivated to make more, and to cater more towards you as an audience?

・The DLSite download page is all in Japanese, how the fuck am I supposed to figure this shit out?
The creator of ROBF is working on registering his game with DLSite’s English portal. In the meantime, however, the Japanese sales page is the only one that works.

Follow this step-by-step guide:

1: Go to the DLSite link and click on カートに入れる (Add to Cart)

2: Click on the Cart Icon on the top.

3: Click on クレジットカード (Credit Card). Other payment options such as Conbini Pay and Webmoney are Japan-only.

4: Enter an e-mail address (and again to confirm). Temporary e-mail services like GuerillaMail should work fine. This was successfully tested with GuerillaMail. Then click on 取扱いに同意して確認ページへ (Agree and go to confirmation page).

5: Click on テストメール通信 (transmit test mail) to confirm your e-mail address, and check your inbox to make sure it worked.

6: You should see テストメール通信完了しました (test mail transmission complete). Now click 外部決済へ (to external payment).

7: You will be redirected to an external payment portal (www5.econ.ne.jp). Online prepaid credit cards should work, as well as regular credit cards. This has been tested with a Japanese VPreca prepaid credit card.

Enter your card number, expiry date, cardholder name, and CVV, then click 次へ (next).

8: Confirm the information and click 注文確定 (settle order).

9: You’re done. If you feel so inclined, click ダウンロード to download the official Japanese version.

Thanks for supporting improved relations between Japanese Doujin creators and overseas fans.