(No overpowered protagonist, no System, no wish fulfillment, character-driven, readers who mind should proceed with caution)
When I thought this was just an ordinary high school life, with snacking even part of the daily routine, I discovered that I had unexpectedly gained a spiritual root for cultivating immortality. When I thought this talent would only cause a ripple in my life in a peaceful modern world, I discovered that two hidden worlds had suddenly collided, and war had spread through everything we knew. When I thought I was merely an ordinary person struggling to survive this catastrophe, I discovered that the strange passageway, triggered by the S-grade spirit stone I had picked up, was the only key to ending the conflict and even ascending to the upper realm.