Flying Thunder God Technique

After the customer disguised as an Anbu ninja left the shop, Richard resumed developing the Rasengan. Although the shop was not particularly large, he did not need to test the power of the new Rasengan inside it, nor did he need to worry about accidents during development. Time flew by. Soon, it was five in the afternoon. Other than the customer disguised as an Anbu ninja, the shop did not receive any other customers that day. But that was a good thing for Richard as well.