The Regressed Saintess Becomes the Duke's Sister's Tutor

Why don’t we just get engaged?" "I’ll stick with my work until the very end!" A charming, stoic young lady’s workplace fantasy unfolds! Saint Ernesta, executed by her beloved fiancé, finds herself brought back to life. Determined never to be a saint again, she sets her sights on a stable career as a civil servant. While studying diligently, she’s unexpectedly recruited by Duke Julius to tutor his sister!? Julius is a popular figure among the ladies of the shogunate, known for his sharp mind and habit of refusing marriage proposals. Wanting no part in romance, Ernesta keeps things strictly professional only to find that her cool demeanor has piqued Julius’s interest...?"