Studying at Izu University and Awakening the Soul of the God of War

A British man studying in Japan awakened the soul of the God of War in his previous life He stayed in a diving store run by the Furukawa family, drank flammable oolong tea with muscular men, and secretly eliminated unknown creatures from the sea. The introduction is difficult to write. It is my first time writing a book. Please give me some advice. I am trying to write a book. The writing may not be very good. It has a single female protagonist. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.