Concept Overview:

The protagonist, Akira, finds himself reincarnated in a fantasy world with only one bizarre yet powerful skill: the ability to order products from his previous world through an online shopping system. These products range from mundane items like soap and salt to extravagant ones like pizzas and technology. However, the world he's reincarnated in is full of monsters, magic, and kingdoms in conflict, and his new skill could change the course of history.

Themes:

Adaptation and Discovery: Akira's journey of adapting to this new world while exploring the limits of his power.

Resourcefulness: The exploration of using ordinary things in extraordinary ways.

Power and Responsibility: How his unique ability might become both a blessing and a curse as he faces opposition from those who seek to control him.

Ethical Dilemmas: The consequences of bringing products from the modern world into a fantasy world.

Structure:

1. Prologue - The End of the Old Life: Akira's sudden death and rebirth into the new world.

2. Chapter 1 - The Awakening: Akira discovers his new skill and tests it.

3. Chapter 2 - The First Purchase: Ordering something trivial like salt.

4. Chapter 3 - The Magic of Soap: How soap turns into a highly prized commodity in the new world.

5. Chapter 4 - The Kingdom's Request: A kingdom asks for Akira's help, leading to a first real conflict.

6. Chapter 5 - Unseen Forces: A darker side of his powers emerges, and others notice his abilities. ...

(And continuing with escalating adventures, conflicts, and the discovery of more powerful products as he faces new challenges.)