Episode 11 of "S-Rank Musume" titled "Belgrieve's Decision" begins with a mysterious voice calling for help, and we see the shadows of a young Belgrieve being attacked by a monster.

The scene then shifts to Maria's rigorous training of Byaku, a scene marked by the tension of mastering mana. Maria's stern instruction not to rely on the Demon King's power. At the same time, the dialogues between Angeline and Char reveal their deep familial bonds and longings, painting a vivid picture of their lives and dreams. However, their plans to return to Turnera are abruptly interrupted by a summons from Grand Duke Estogal.

In Turnera, the episode delves into the lives of Belgrieve, Graham, Marguerite, and Duncan. Marguerite's burning desire to start an adventurous life contrasts with Duncan's contemplative decision to embark on one final journey.

Angeline's struggle with the Grand Duke's summons highlights her inner conflict between personal desires and the weight of duty, leading her to first go to Estogal City and postpone her trip to Turnera.

Belgrieve is haunted by memories and faces the dilemma of confronting his past or staying to ensure Turnera's safety.

Towards the end of the episode, the character Kasim is introduced, shown in a prison cell reminiscing about past experiences with Belgrieve and their former group. He recalls a specific incident where Belgrieve's sharp observational skills thwarted a covert attack on their group, during which he lost his foot (the scene at the beginning of the episode).

The episode ends with a teaser for the next episode titled "Confronting the Past," hinting at Belgrieve's upcoming journey and the reckoning with that past.