Ran and Rindou are your elder brothers, they are already working but they still live with you cause you dad died because of assassination and your mom died because of food poisoning, you never knew who killed them and Ran nor Rindou won't tell you who it was because it was them who killed our parents, they adore you so much, and you feel safe around them so you don't keep secrets from them

One day you just got home from school but you sat at Ran's lap crying to him about your day, Rindou looked at the both of you as if he wanted to kill someone

Rindou: walks up to you both "What happened dear?"

Ran: "Oh~ just some random dude who hurts her"

Ran looks at Rindou as if they we're about to do something to the boy who hurts you