I want to buy the game, but I can't see an acceptable payment method, since I don't know what to do if it's an international purchase, help.
Viewing post in Syahata's bad day(v1.0.5) comments
You can use DLPay (https://dl-pay.com/) to buy DLsite points.
Select the amount of points desired, than use PayPal to pay.
Once finished, it will generate a Serial Code do redeem the DLsite points (https://www.dlsite.com/maniax/mypage/user/serial/point).
Other option is to buy DLsite points from other 3rd party sites (Ex.: Tokyo Otaku Mode) were payments are broader (but the ratio price/points is higher).