Kamisama to Unmei Kakusei no Cross Thesis (Japanese)

From long ago angels and demons have been waging war against one another. As both sides continue to shed blood the demons have had the overwhelming dominance in the war however in secret the angels had created the ultimate anti-demon weapon the "Fate Awakening Crystal", its power even having the ability to turn someone into a god. It was after a certain incident in which a human named Kamikaze Shin dies by being pierced through the heart that the "Fate Awakening Crystal" had been transplanted into him and from here his life entangled in the war between angels and demons. With the meeting of the dedicated angel Jupiel and the demon scientist Ariael his normal everyday life has changed now that he has become a god and thus leading to the "ultimate choice"......with the main story aside Shin, Jupiel and Ariael were suddenly told to have a vacation and so return back to the human world! and this where the everyday life of three comical side begins.