辺境の薬師、都でＳランク冒険者となる～英雄村の少年がチート薬で無自覚無双～ raw 第01-12巻 [Henkyo No Kusushi MIYAKO De S Rank Boken Sha to Naru Eiyu Mura No Shonen Ga Chi to Yaku De Mujikaku Muso vol 01-12]

Leaf has been enjoying a peaceful life in his village at the farthest end of the country, but everything gets turned upside down when his fiancée betrays him, robbing him of his home, work, and everything he cherishes. Wandering around, lost on what to do next, he encounters a distinguished lady in peril who will change his life forever! Using the cheat-like power of medicine and drugs the world scoffs at, Leaf now begins his journey to become the almighty healer!

Source: K Manga