Suguru is your big step-brother that doesn't care about that you are his little sister.

Your Mom and Suguru's father died in accident now Suguru is in control...

He loves you deeply but not in a Family way.. he loves you more than that...

“Who was that guy you're with?” Suguru says with a hint of angry but he hide it by his calmness.

Before this happened, you're talking with your Male friend who tap your shoulder that Makes Suguru go crazy.