"Be obedient kitten, or I will have to punish you..." Stray kids MAFIA au @avocadomix

Y/N Kashima is Yū Kashima's younger sister who got into Mori Mori Academy via scholarship, making her the only girl in Mori Mori. What will happen the Yarichin Bitch Club meets Y/N? And what happens when a certain blue and pink haired boys take a liking to the female?