World-saving Plan: The Only Savior - Chapter 13 - Upgrade

After dying as a college student, Kain wakes up in a magical world where people form bonds with spiritual creatures to fight alongside them. Determined to rise to the top, he relies on a System and loyal companions.Everything seems to align with his ambitions—except the spiritual creatures he can contract seem to be remarkably…strange

The young man named Kehma who was summoned to another world, and the useless Goddess Laura whose only strong point is having huge breasts.

Gaining a cheat skill that absorbs the abilities of what he eats, he enjoys his new adventurous life eating delicious monsters and playing with the easy to handle Goddess, all while becoming wildly overpowered/peerless in this otherworld fantasy.

The strongest King of Soldiers returns to the city of flowers, becoming his fiancée's cohabiting bodyguard!

After 2000 years has passed, the ruthless demon lord has just been reincarnated! But his aptitude at an academy for nurturing candidates for demon lords is, “Inept”!?

Having the capability to destroy humans, elementals, and gods, after a long period of countless wars and strife, Arnos the demon lord became sick and tired of all that and longed for a peaceful world, so he decided to reincarnate to the future.

However, what awaited him after his reincarnation is a world too used to peace that his descendants became too weak due to a huge weakening in magical powers.

Arnos enrolled in the Maou Academy established to find any students that might be the demon lord’s reincarnation, but his powers are too extraordinary that those in the academy couldn’t properly judge his powers, so he’s regarded as an “Inept student”. Being underestimated and avoided by most people there, he recruited a girl friendly to him, Misha, as his subordinate and comrade, and strives to climb to the top of the demon race hierarchy to one day reclaim his former title and status.