My Sister Turns Into a Yandere at Night

**[Transformation + Not Biological Sibling + Healing + System + Daily Life]**



Although my sister is widely recognized as the school's beauty, her attitude toward me at home is terrible.



The reason for this? She’s a girl who only likes other girls!



Then one morning, I woke up to find that I had turned into a little girl with white hair and red eyes!



What’s even stranger is that the group of beautiful girls who once disliked me have completely changed their attitudes toward me!



The cold, black-stockinged, high-class lady secretly turns out to be a huge siscon!



The soft and cute little girl secretly has a dark side and is a mischievous little devil!



The elegant and tsundere young lady turns out to be unexpectedly pure-hearted!



And my obedient little sister? She turns into a yandere at night?!



At the same time, a mysterious system demands that I become a famous idol in the beautiful girl sector? What on earth is going on?!