You've Got Mail: A Cautionary Tale - Chapter 78 - Forever and Eternal Peace

Long Fei, a cross-timer and doujin, is an otaku who traveled to another world. In the original world, he was an otaku fan of Gundam and military science fiction.

He died in an accident and was reincarnated into another world. The Gundam works he had read before his death and the techniques in various military novels could be brought to another world.

How would he use the Gundam that Long Fei created? What waves can be caused in this different world?

- Description from novelbuddy

Greed, envy, anger, gluttony, lust, sloth, prideThe 'Black Book' records seven sources of sin, which are also seven steps to ascend to godhoodOnce, I thought there would always be one sin suitable for meBut I never expectedEvery volume of the twelve military letters bears my name!

Seventeen-year-old Dominic Hayes had always been a quiet dreamer—chained to hospital beds, IV drips, and the ticking clock of his diagnosis. Leukemia stole his strength, his youth, and finally, his life. But fate had one more surprise waiting for him beyond the veil.When Dominic awakens, it’s not to the afterlife he expected—but to the crashing waves and boundless power of the ocean itself. He has been reborn as Poseidon, the Greek God of the Sea. With divine power surging through his veins and immortality in his grasp, Dominic is no longer the dying boy in the hospital—he is a god.But power comes with purpose.As he grapples with his new identity, ancient forces stir. Old gods rise, long-buried secrets awaken, and the balance between realms begins to crack. Dominic must decide—will he embrace his divine fate and protect the world he once had to leave behind, or will he drown in the very depths of power he never asked for?In this epic journey of rebirth, grief, and second chances, Reincarnated as Poseidon is a tale of what it means to live, to lose, and to rise again with the fury of the tides.side characters :Zeus, Hades and Athena

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.