Ahh i don't know what to do! helpp!?

Helpp! i just went to barnes and nobles today and i bought the manga Spice & wol..i thought it looked cute so i got it and when i was in the car i flipped through and noticed she was naked in alot of the parts.. i don't rly mind since im a girl but my. older brother wants to look at it and i dont wanna get in trouble! (im 13) what do i do? ?