俺以外誰も採取できない素材なのに「素材採取率が低い」とパワハラする幼馴染錬金術師と絶縁した専属魔導士、辺境の町でスローライフを送りたい。

天才錬金術師ルビーの専属魔術師ロイドは、素材採取率わずか40％で国中の笑いもの。Lloyd, the resident mage of the genius alchemist Ruby, is the laughing stock of the whole country with a material extraction rate of only 40%. He was so disgusted with her that he decided to break off his relationship with her. But what they didn't know was that he could only collect S-rare materials and no one else could.... He sets out on a journey, and begins to show glimpses of his master-class power to adventurers he meets and to Iris, a former saint!