[Host has just made the first Thief Promise]
-Thief Promise: An unbreakable promise of a Heaven's Stealer
-Abstract: Theft is not just about stealing for one's own benefits and motives. Sometimes a theft was done for the greater good and for others who were in need.
-Description (1): A Thief Promise can only be triggered when the host willingly agreed to take a mission from someone else who's desperately in need of host thieving abilities.
-Description (2): The system will instantly trigger a mission when the possessor of a Thief Promise declared their reasonable request.
-Description (3): If the bearer had any malice against the host, the Thief Promise will be deemed void by the system.
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