Flame Bride.

A wealthy young woman infiltrates the enemy army under false pretenses to avenge her fiancé but is coerced into marriage by a young general. As they navigate their cunning and tumultuous married life, they unexpectedly fall in love. However, their relationship is tested when she discovers his true identity, leading to mutual distrust and conflict amidst the power struggles of warlords. Despite their deepening love, they begin to torment each other.