The Hero's NTR Adventure

The demon lord is threatening world as usual, and this time,
hero Roy and his childhood friends, priest Marie and warrior Sasha are here to save the world.

During the journey, they encounter a strong mage, who enters their party.
However, he's not after the demon lord, he's after the girls...

The hero is weakened and cursed by the man's magic, and can contribute nothing to combat.
However, his Hero's Sword is needed to take out the demon lord, so he can't give up.

And all the while, behind his back, his party members are getting cucked...