I am a holy knight, how can I have a heart tail?

As a succubus, Rita only wanted to become a holy knight and live a comfortable life in the royal capital — one with high pay, light work, and social prestige.

Until one morning, on the day of her qualification test, Rita opened her eyes and found a strange girl lying beside her in bed.

Wait a minute—what do you mean, succubi “hunt” people in their sleep…?