I love this one. MC can go back and fort to other world through a door in his house. He won a big lottery and use it for helping poor and sick people in other world by buying stuff in real world and taking them there.
You may feel your favorite manga should be gathered together into distinct categories for your own reference and, now, you can do this with a LIST. After you've created your list or lists, you can proudly recommend them to other manga fans to showcase and share your taste in manga.
Kuro no souzou shoukanshi - tenseisha no hangyaku -