Long ago, a shooting star fell to the earth. The very next day, a white tower stood where it landed. That tower is now known as the Tower of God, a place bursting with an endless supply of weapons, attracting adventurers from all over. Mei, a kind-hearted but ditzy adventurer with amnesia rescues an armless man named Gilles inside the tower. Together, they decide to climb to the top of the tower where Mei hopes to recover her memories. But the medicine made by Gilles to aid their journey has a sexy side effect, and at night Mei funds her adventure by working a job she’s reluctant to talk about…