: The protagonist, Shiro Amata, discovers a portal in his late grandmother's closet that allows him to travel freely between modern Japan and a fantasy world.
The series features several unique plot elements and world-building mechanics: Itsu Demo Jitaku ni Kaereru Ore wa, Isekai de G...
: Shiro possesses an all-powerful skill that allows him to convert Japanese yen into otherworldly currency and vice versa, which is central to his goal of becoming incredibly wealthy. : The protagonist, Shiro Amata, discovers a portal
: It is revealed that Shiro's grandmother was actually a powerful witch from the other world who fell in love with his grandfather and moved to Earth. : The protagonist