我想买遗忘河之水系统为什么要求一次买两瓶啊!很贵!我只想拿36RMB买!有没有什么办法一次买一瓶啊?jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj!!!完成后在给10财富!!!(应定要合理)有条件的来发个截图吧!