Akuyaku Reijou (Yotei) Rashii kedo, Watashi wa Okashi ga Tabetai

Linea is shunned by those around her as the daughter of a "devil-like count". One day, after eating sweets given to her on her birthday, she has a nightmare about being imprisoned. "This dream can't be...!?" Linea was worried, and the day after she ate more sweets, she acquired a "obstruction skill".
Is it all because of sweets...? And the truth of her dream is...?
With hints from her dream and newly obtained obstruction skills, I will avoid my future of destruction!