a/n : I read about CainSetsu and I fell in love at first sight. I really wish their arc won't end, even if the manga ended.
When the world looked at them, they would think they're the weirdest, most perverted and most dangerous couple walking on the Earth like they owned it.
But the truth was, the only thing they owned was one another.
To Cain, Setsu was no ordinary sister. She's his psychopath girlfriend disguised as a sister with brother-complex..
Not like he mind it of course.
If anything, he was pleased with her.
"Nii-san." Setsu called when she noticed her brother's smiling, snapping him out of his thought. "Are you thinking about other girls?"
Cain's smile turned to a smirk, continue walking by her side without looking at her. "What if I am?"
Setsu stopped walking, stood frozen at her brother's reply. She knew he's a sadistic teaser, but he knew well how much she hated when other girls gained attention from him. She clenched her fist and spat sideways as a protest to her brother's feign ignorance who already 10 steps ahead of her.
"Ah is that so?" Setsu turned, their backs were facing each other. "Then, I'll go and find another man for me to think as well~"
Just as she was about to take her first step, Cain already hugged her from behind and his animosity was so obvious that it scared everyone in the ten-meter radius.
"Nii-san."
"Are you trying to make me jealous?"
Setsu smirked. "Then, you can die in jealousy, idiot Nii-san~" She said it in a singsongy tone, like it wasn't a big deal.
Cain spun Setsu around, making her face landed on his chest, with the significance height difference between them.
"I don't mind dying, but I'll drag you with me as well."
Setsu smiled slyly. "Nii-san." She relaxed into his embrace. "You have a serious sister-complex, isn't it?"
"Shut up."