女神の勇者を倒すゲスな方法 / The Dirty Way to Destroy the Goddess's Heroes Series by Sakuma Sasaki, Asagi Tosaka

After defeating the heroes, Shinichi is ready to live out his happily-ever-after--until a powerful spell blasts through the sky, aiming for the Demon King and marking the arrival of their newest enemy, the Saint! When Shinichi realizes she won't fall for his sweet nothings, he scrambles to come up with another plan, which now involves Rino's debut...as an idol!?

With all dirty schemes successfully deployed' Shinichi and his friends have finally gotten the church to agree to a temporary truce. Next up is...taking on the Goddess herself! Easier said than done' since they still have no leads on who she is or where she could be hiding. Their only hope is to locate a forest at the top of the Goddess's hit list' known for housing the Elven Tomb... moreWith all dirty schemes successfully deployed' Shinichi and his friends have finally gotten the church to agree to a temporary truce. Next up is...taking on the Goddess herself! Easier said than done' since they still have no leads on who she is or where she could be hiding. Their only hope is to locate a forest at the top of the Goddess's hit list' known for housing the Elven Tomb. But Shinichi will need to tread carefully: The elves protecting the sacred monument are so hostile toward humans that even the undying heroes are no match for them! less

After escaping the Goddess's attacks by going deep into the Demon World, Shinichi is desperate to find a way to counterattack. But even when he scans the ancient texts to get a leg up on her, he doesn't come up with any leads. That's when he finds where the red dragon has been slumbering all this time. In this climactic volume, Shinichi realizes he needs to act now--if he wants a shot at taking the Goddess down for good!

Who knew life without the goddess could be so peaceful...? Just kidding! Without something to believe in, the humans are in shambles. Trouble is around every corner-no heroes and too many demons, scheming government officials and corrupt clergy members. As if that isn't enough, Shinichi needs to deliver on his promises and tie up all loose ends...including picking a main love interest to conclude the final volume of the series!