Ryota awakens in another world, dropped by a slime that a girl named Emily had killed; Emily is strong, but her drop rates are pathetic, so she doesn't earn enough to afford a home; since Ryota's drop rates are through the roof, he decides to help.
A bunny girl named Eve attacks Ryota, but he survives thanks to his enormous HP stat; then Eve reveals that the real reason she came to him was because she saw him getting carrots from a dungeon, and she wants some.
Ryota and Emily decide to try out the second level of the dungeon Nihonium for some new drops, but Emily has a problem with the monsters they find there.
Ryota's skill has proven so profitable that he decides it's time to move into a new home with Emily; but then he learns about magic carts, which can help him carry even more items out of dungeons, and sees an opportunity for even greater profits.
A magic storm occurs, nullifying all magic and leaving magic-based adventurers powerless; but Ryota learns of one magic user who's stuck in a dungeon, unable to fight, and volunteers to help her when no one else is willing to take the risk.
Ryota obtains a second gun, which helps him discover a powerful new use for his special bullets. His exploits catch the eye of Secro's dungeon chief, who has a favor to ask of him...
Kaito Ishikawa
Ryota Sato
Rin Kusumi
Emily Brown
Marika Kono
Eve Callusleader
Mai Fuchigami
Erza Monsoon
Saori Ōnishi
Celeste