Scarlet Crimson

Transmigration into Death Note as Sayu and before the Death Note anime starts? Well, either my brother dies or I die. There is no other option. This is in first person, so unreliable MC. I HAVE NOT BEEN TO JAPAN, SO "yen, san, school system" will be American styled. THIS IS MY FIRST IN MY ENTIRE LIFE FANFIC, SO CHARACTER DEVELOPMENT WILL BE LACKING.