Our protagonist, wishing to return to the old days, goes back in time to get revenge on the girls who bullied him as a kid.His big sister Saki... and his classmates are definite candidates....But how about his childhood friend, Sera...?
Also known as: ガ○にもどって犯りなおしっ!!!Gaki ni Modotte Yarinaoshi!!!ガキにもどって犯りなおしっ!!!