With Vengeance, Sincerely, Your Broken Saintess

Lua, known as the flawed saint, risks her life to save her beloved Garrot. However, her best friend, Arian, steals the credit for her achievement, and the two become engaged. Having lost everything, Lua vows revenge on those she trusted.

Betrayed by Ariane, Lua is visited by the second prince, Sven. Sven offers her revenge, and Lua learns of the shocking darkness within the temple.

In an attempt to uncover the High Priest's secrets, Lua investigates information about the Yuan tribe in the royal library. That night, she witnesses a secret meeting between the High Priest, the Yuan tribe, and Arian…!?

Lua has teamed up with Sven. Sven suggests that the two of them infiltrate Viscount Dedmond's ball and gather evidence of his wrongdoing. Meanwhile, Ariane is also planning to go to the ball with Garrot.

Wearing the dress given to her by Sven, Lua sneaks into the ball with him. She tries to approach Dedmond, but Ariane and Garrote appear instead.

Lua and Sven notice a maid acting suspiciously at the ball. They take the maid out of the hall and question her, and learn about the despicable acts Dedmond had committed in the past.

As Sven reflects on his past, his feelings for Lua gradually grow stronger. Meanwhile, Lua, having successfully made contact with Dedmond, heads to Dedmond's room alone.

Lua makes contact with Dedmond in the bedroom. Using her saintly abilities, she tries to corner him and gather evidence of his wrongdoing. Meanwhile, Sizzy, who was waiting, witnesses a secret meeting between Arian and a suspicious man.

A monstrous beast suddenly appears at the ball, throwing the venue into chaos. Sven confronts the beast, trying to help Lua escape during the battle. But Lua has a secret plan...?

The two exposed Dedmond's wicked deeds, but they couldn't find any evidence of the High Priest's involvement. Lua was ordered to have an audience with the King and headed to the royal palace, but on the way she encountered Salid, Sven's older brother who was considered the next king.

Lua is questioned by Salid, but is saved by the help of Salid's fiancée, Diana. Having an audience with His Majesty the King, Lua tells him her wish as a reward for calming the monster disturbance.

Lua is reunited with Louise, who served the Restatt family in her childhood. She is shocked to learn that her family's deaths were the result of a "scheme." Just then, she is recommended to be the Rose Princess for the Goddess Lushe's birthday celebration...!?