18+ Taberu dake de Level Up! Damegami to Issho ni Isekai Musou

The useless goddess Laura whose only strong point is having huge breasts, and the boy Kehma who was summoned to another world.

Gaining a cheat skill that lets him absorb the abilities of what he eats, Kehma enjoys to the fullest the other world life eating delicious monsters and toying with the easy to handle goddess.

(Source: Novel Updates)