Diabolik lovers Yui younger sister

Mya is yui younger sister.she is also know as a troublemaker,what will happen when Mya meets the sakamaki brothers along with yui :-) . Will she finally become a good girl? or will she remain a troublemaker for the rest of her life :-)

Plz don't judge me or my book I am only 12 years old :-). Enjoy !

ps. I suck at descriptions