The premium currency in King's Throne: Game of Lust is gems and as you would expect there is not an abundance of them. Check out our How to get Gems guide to find out how you can build up a stash of them without having to spend real currency.
During your first week of playing King's Throne: Game of Lust it is only possible to accumulate about 2,000 gems so it is important that you spend them wisely. The actual amount you get during this time when you log in will depend on the level of your kingdom. You are free to spend the gems on anything you want but at this stage of the game it is advised that you resist the temptation of using them to purchase resources and items in the shop and instead use them to expand your Children's Rooms and your Training Ground to at least 5. Doing so will allow you to operate both features with one click instead of having to raise each child individually and train every hero manually.
Aside from the daily stipend you recieve when you log in you can earn more gems by collecting the monthly login rewards, which can amount to around 3,000 gems per month if you regularly visit the game each day. Try to complete the various Daily and Progress Quests that are on offer at the bottom of the main 'Castle' screen as this is a good source to regularly get a decent amount of gems.
Another way in which you can get free gems is by going to 'Rankings', followed by 'Local Rankings', and tapping the 'Pay Homage' button on the bottom-right corner of the the three tabs - Kingdom Power, Campaign Progress, Maiden Intimacy.
Check out our How to get Maidens Guide to find out the different ways you can obtain them and earn EXP and Intimacy when you visit them.