The Boy Who Ruled the Monsters: Volume 2

Sol Rock has fully unleashed his powers as Player, obtaining a loyal servant in Luna. Thanks to her, he can speak with the princess of his home country on an equal footing. However, he knows that the Holy Church is looking for a way to eliminate him, so he sets off in search of more power, doing the unthinkable in the process: he enters a taboo territory! Soon after, fate guides him to a young girl who turns out to be another monster from legend: Aina’noa la Avalil, otherwise known as the Captive Elven Queen. In saving her, he finds himself now pitted against Istekario, a military superpower! Sol’s journey to create a party of the world’s greatest monsters continues as the curtains rise on volume two!

[From J-Novel Club]