The story starts with a guy winning 4Billion Yen in a lottery but went to some secluded area to avoid the money leeching mongers after him. He discovered a gate to another world. There, he encountered villagers affected by an epidemic which he easily cures with some pain killers and energy drinks. The twist is that he is freely able to go back and forth to japan to get what is needed for the better of the village. The romance is quite good paced I think. He is somewhat close to the village chief's daughter. He is highly revered as the savior of the village. He improves the village's economy by introducing farming and watering tips. It also seems that every foreign object he's brought in the other world to be of relatively high value such as 1kg salt.
