My Predicament?

At one of the three large Royal Army harbors, the Octo Harbor, 

This place was usually calm, and only when someone from the Imperial Family or a Grand Demon Duke was moving out into the endless sea with a fleet could this harbor be used! 

Except for the usual patrolling fleets, this place remained tranquil all year long. 

However, today, a large regiment of Demonic Marine Army was present here today and covered every corner of the Octo Harbor as if they were all guarding this place against a terrible enemy. 

At the edge of a large empty port, a tall nightmare demon with long hair and a fierce look on his face wore a purple army robe, which was the uniform of the Demonic Marine Army. 

This demon was one of three Demonic Marine Generals, and he was in charge of Octo Harbor, Demonic General Alessandro.

Two more demons donned in full-body purple color armor were standing behind him straight. They were his deputy generals.