"autopunch"ed,and then?

[walkonbothsides]

Hi,developer.It's my first time to use autopunch.
Successfully 'punch'ed Touhou Hisoutensoku,as a host,I don't know what to do next.

Give the other one my IPv4 address?But it's random and it can't be used to connect because of carrier-class NAT.

What should I do next?