Ruthless Vows

Why these tropes fit

Two war-torn lovers are pulled apart when Roman awakens in the enemy god Dacre's realm with no memory of his past, forcing him to write propaganda for the opposing side while secretly exchanging letters with Iris through a magical wardrobe. As Iris leads a daring return to the front lines and Roman weighs betraying the god who saved him, the two are inevitably drawn back together, risking their hearts and futures to turn the tide of a war that is closing in on an unprepared city under the chancellor's fracturing rule.

Evidence from the source

• Amnesia: “Roman cannot remember his past. But given the reassurance that his memories will return in time” source
• Betrayal: “to stand with Dacre or betray the god who healed him” source
• Epic Saga: “The epic conclusion to the intensely romantic and beautifully written story that started in Divine Rivals” source
• Forbidden Love: “inevitably drawing Roman and Iris closer together...the two of them will risk their very hearts and futures to change the tides of the war” source

Metadata source: Google Books. Quotes are used only to verify the tags.