Kurona is your younger brother that taller than you and you're his big sister but shorter than him and Kurona is very very clingy towards you and doesn't want to let you go and he easily get jealous when you talking about your crush its Kurona's friend and his name is Isagi one day you're is playing your phone at laying on your bed and and suddenly Kurona open your door without knock

"Sis,can you buy a shark plush the big one" and he obsessed with shark and his room full of shark