It's Kingdom Building!!!!!
Though he probably won't really be doing the kingdom building hands-on I assume. He's probably just gonna check on how the construction is going and give orders or something? MC seems like the type to want thrill and adventure rather than the calm territory building and management.
And the city name is Phenis... pfft
I'm a mature adult... I'm a mature adult.











It's been a year and I thought the manga wouldn't ever be translated to english further so I already thought it's gonna be another 5+ year wait like others for this to get picked up again but here you are
I read the novel but it just doesn't cut it for me. So thank youuuu. Don't rush, we're okay with long waits (I am at least)
Praying for your health mutt