Yamada, who works as an ordinary company employee, goes to visit the family home left behind as an inheritance by his late grandfather, and there he finds a door to another world!! Beyond the door, he meets a talking black cat and a homunculus girl, and as he begins living together with them, he enjoys a cheat magic life in modern Japan and a heartwarming slow life in another world♪ The best-of-both-worlds life of 35-year-old bachelor Yamada, between another world and reality, begins!

It has been 30 years since the world and the world known as the frontier were connected. Countries around the world began to explore the frontier in search of new resources. Now, with qualifications, even civilians can pass through the gate and go to the frontier. And adventurers were born to bring back and sell the resources. Okita was suddenly fired from his job. With no savings, he decides to become an adventurer to make ends meet. Okita acquires the skill of alchemy in his first adventure. From this moment, Okita Hajime's life begins to shine with gold. At the same time, a [golden witch] was born who breaks the common sense of the world. Translated with DeepL.com (free version)

Lloyd is a prince and a genius when it comes to magic. He is engaged to a beautiful girl and spends his days leisurely immersed in research. However, his father, the king, who despises magic, disinherits Lloyd. In retaliation, Lloyd and his friends play a prank that sets the palace on fire...!? The slapstick adventure of the most sleazy magician begins! (Source: Kadokawa, translated)