The Strongest Heroes, Now in Their 40’s, Once Again Become Warriors on the Battlefield

Story:

The tremendous might of the Seven Legendary Heroes! In the "Titanomachy" war of extinction, humans triumphed by annihilating the demons entirely. Since then, 25 years have gone. One of the seven heroes, Alain, who defeated Beelzebub the Demon King during the battle, is already 43 years old. He was having a nice time as a knight commander on the border, wedged between rigid lords and obnoxious minions. But suddenly, things shift. The demon army that was supposed to be killed awoke and attacked. The subordinates were unsuccessfully defeated. The elites merely transferred the burden to others. Alain then got back up. To shatter the sword this time and establish a connection with the younger generation. In reaction, the erstwhile allies assemble once more. Seven historical figures have now reentered fight!