World Development System - Chapter 329: 260. Spoiler*. (Title at the end of Chapter)

Mo Han was in a tough spot. His daughter, Chen Chen, needed a lot of money, three hundred thousand, for an operation to treat her leukemia.He didn't have the cash and didn't know what to do. So, he tried to come up with some sneaky plans near a bar, hoping to raise the money that way. But things went from bad to worse when an old classmate who had rejected him in college caught him red-handed. She made fun of him and made him feel even worse.When Mo Han's wife, Luo Ning, found out about the situation, she rushed over with Zhang Hao, who had a crush on her. But instead of helping, Luo Ning shocked Mo Han by suggesting they get a divorce! And just like that, she left with Zhang Hao in a car, leaving Mo Han feeling alone and confused.After a night of heavy rain, something amazing happened to Mo Han. He unexpectedly inherited something really special from someone called Ye Lingfeng, a fallen medical expert. From that moment on, Mo Han's life took a turn. He decided to take charge of his own destiny and set out to change the world, no matter what challenges came his way.

On a certain day, a certain thought came to Japan’s Sun Goddess. ——Aren’t there too many Japanese people being abducted to other worlds? It’s true that the large majority of Japanese are diligent and docile and soft-hearted, which makes them pretty much the best people to ask for favors. “But recently it’s just gotten way too out of hand…… Oh, I’ve got it! Whenever a Japanese person is summoned, I just have to summon an otherworlder!” And now, every time a Japanese person is summoned, princesses and elves and beastmen and whatnot are reverse-summoned. Under the acknowledgement of the government, they begin living in Japan. Today, too, Japan is at peace. And so begins this laidback isekai cultural exchange story♪

Three years ago, in the land of Reinbulk, a Legendary Hero was summoned in the Kindom of Leezalion and he succeeded in repelling the Demon King. Now, five students are summoned back into Reinbulk by the Kingdom of Luxeria to fight against the Demon King and the demon army. Unlike the other heroes, Yashiro Yuu has no magical affinity and the Luxeria Kingdom has no intention on acknowledging his existence or returning him to his world.

When traveling back to Japan's late Muromachi Era, how to survive becomes a significant challenge!Now, Harano must live well under this high-difficulty challenge!