The Otherworlder, Exploring the Dungeon, Vol. 2 (manga)

Souya-s dungeon adventure has begun in earnest, but now that he has cast aside his guns, he-ll need to master a new weapon if he wants to hold his own. The bow seems like a promising choice, especially after he convinces a pair of beautiful elven sisters to teach him. Things are going smoothly-until the elves- mysterious past catches up with them! What once looked like a quick side quest ends with Souya embroiled in royal politics and fighting for the honor of his new comrades-!!