Hm.... its more like the protagonist play hard game and the other play easy game from the start.
they leave him, so they can learn their ability faster rather divided when together or experiment things
1=sister(backside), 2=white girl(front right) , 3=brown girl(front left)
How can you grab number 2 clothes with your right hand after that number 3 clothes with left hand and the last number 1 clothes with both hand ,if you holding hand number 1 with right hand without falling to the number 1...