Review Detail of CKtalon in Let Me Game in Peace

This novel is set in a post-calamity world caused by dimensional storms. All kinds of mythical creatures appear on Earth, but are confined to dimensional zones. Interestingly enough, these creatures can be used as Companion Beasts that can fight in battle and be used to augment certain parts of one's body. It's like an upgraded version of Pokémon! Our main character is considered a genius teenager who's rather kind and benevolent. He's calm and aloof and really just wants to game in peace to become stronger. However, there are plots and dangers that lurk in the shadow that somehow embroils him into it. One good thing about this story is that most of the characters will continue for hundreds of chapters as they build up a strong team of friends to face the pending dangers of this new Earth.