Well, if any of this information comforts you, then here we go, Makoto was neglected as a kid, and he gets kidnapped, beaten up, and raped in later chapters. Ai is deeply in love with his brother while Yu doesn't seem to have the ability or the desire to kill anyone.
Do you know how many vol are out?
there are currently 2 english translated volumes
Neglected as a kid makes me sympathize a bit, but not excuse being a sadist jerk.
Him getting kidnapped and beaten up will make me feel better. :D THANKS.
I'd love to see Ai kill Makoto.
Or Yu kill Makoto
Or a random stranger kill Makoto.
Or Truck-Kun run over Makoto.
Cause I fucking hate sadist jerks.