The Day The Sky Went Red

As the war for man kind continues , and the titans taking a beating due to the humans new weapon Eren Yeager. Many still lose loved ones, this is no exception for 13 year old Akio Komatoe. With the loss of his entire family during the attack on wall Maria, only left with his grandmother, he has sworn to stay by her side and won't anyone hurt her. How long can he keep this promise , and if he can't what will he do to keep living on ?