Don’t Be Carelessly Friendly

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For centuries, celebrated as a genius knight of the Caleta Empire, ‘Lustica Zenas,’ who battled the ‘Barrier’ and unending wars, saw all her strength vanish overnight, as if it were a lie.
After four years of seclusion, a mysterious man named ‘Hayden’ appears before her, with whom she spent a sweet night, yet his true identity remains unknown. Hayden seems to remember the past Lustica.
Meanwhile, the Emperor of Caleta summons her, now living like a pauper, and dispatches her as a diplomat to the longstanding enemy, the Perseta Empire, beyond the crumbling barrier.
Will the former knight Lustica, who has lost all her strength, be able to reclaim her past self?