You can't understand cause you probably don't remember that their parents are dead. Imagine yourself as a young boy still in elementary school and you get told your parents died. Your world seems to have been flipped upside down. The only thing you have left is your younger sister. It's not like he has romantic feelings for her but he is super protective because she is the only constant he has left in his world. Not to mention it's his job now to raise and take care of her. All that responsibility when he is just a kid himself? Enough to crush a grown man let alone a kid. The world isn't sunshine and rainbows. Orphans do exist.

They need to chill with the cover pages. It's November.

It's 6 chapters of roller coaster emotions!!! Also I think she has split personalities to cope with the trauma. Why is this manga making us feel all of these emotions?! And why do we want more?!

Dad speaking facts. Nothing is free in the world. They have learned many valuable lessons.

Slime house has a water slide. I like that.They know how to have fun.

Good lord, Carina was more than ready to screw both of them. The thirst on that woman is strong.

"WHHAATT???!!!"
Famous last words.

Pretty neat armor design on him.