Ira pondered for a moment, considering whether he should say it or not, but finally made up his mind and said, "Actually, I improved the fertilizer, and I also persuaded Isabella to ban foreign trade."

“I am naturally familiar with the fertilizer production process and raw materials. Although Mana was indeed involved, the fertilizer I designed is not as complicated in terms of technology and materials as you imagine... We should be able to make it.”

Surrounded by the scattered headless knights, Ira, Shilina, and Satan stood around the field, saying this... his gaze fell on the goblins and goblins pulling weeds in the field.

"That's great, Mr. Ira!"

"..."

However, apart from Satan Ye's happy expression, Shirina did not show any happiness. She knew very well that such things were not something that Ira, as a person, should say.

This is an imperial secret, and also one of the methods used to bring down the demons.

If Ira tells the Demon King, tells her, then it would truly be a case of treason.

...

"Can we offer something in exchange for the fertilizer's processing method? A title from the Demon King's domain?"

The very clear-headed Shirina asked this question, but she didn't think the title was valuable... In fact, if Ira could accept the title, or even just accept the title without giving anything in return, then Ira would be at a disadvantage.

This statement undoubtedly meant, indirectly, to ask Ira whether she wanted to formally join the Demon King's Castle.

"I have no idea."

As Ira said this, she was both answering the question about fertilizer and responding to Shirina's roundabout remarks.