After Teitsu woke up, he found himself lying in a bed, surrounded by shelves and books.

To his right, there was a mirror. After glancing at himself, he found that he was now a baby. He also realized, to his surprise, that he was in a medieval world, not his own.

He decided to sleep again when...

Ding! (Welcome to the world of Laquinthus. I am the system in your head, and I am here to help you grow stronger.)

A soft, robotic voice spoke inside Teitsu's head.

What?" Teitsu thought. "Is that the system I heard about in the mangas and anime?

system! (Yes, it is like that, in your original world.)

Can you read my thoughts?" Teitsu thought to himself.

system! (Yes, I can read your thoughts because I am inside your head.)

A case of literary theft: this tale is not rightfully on Amazon; if you see it, report the violation.

So you can do like the systems in the anime and manga, and create a window in front of my eye to see my stats and open the shop and the missions?

system, (Yes, I can do it.)

Ding! (You have unlocked a new system ability, the window.)

Oh nice, nice, really nice," Teitsu thought, excited. "I don't think my luck will be above the ground and all of humanity, but I must try it.

Open the window.

A window, the size of a laptop screen, appeared in front of Teitsu's eyes.

(Stats button, System Stats, closed, button, System Shop, closed, button, Player Shop, closed, button, Mission Hub button)

A window with five buttons appeared in front of Teitsu's eyes, 3 of them are closed, but the others are opened.

So I think I can just click on one of them?

Teitsu chose the Stats button.