Jashin no Mago - Dark Elf Shimai to Sugosu Isekai Hikikomori Seikatsu

Satoshi Katakura has long embraced a reclusive lifestyle, sustaining himself entirely through investment returns generated from the inheritance left behind by his late grandmother. His quiet, isolated existence is abruptly shattered when he awakens one morning to an impossible sight: a vast, otherworldly realm has inexplicably expanded across the landscape just beyond the walls of his home. Stepping into this surreal new reality are a pair of dark elf sisters who hold Satoshi’s deceased grandmother in the highest reverence, worshipping her as a supreme Evil God. Without hesitation, the siblings bow before him and declare their unwavering devotion, pledging eternal loyalty to Satoshi as their newly appointed master. Their sudden arrival transforms his sheltered world into something far more complex and dangerous. As the dark elves settle into his life, unsettling questions begin to surface. What hidden agenda truly drives these mysterious sisters to bind themselves to a human shut-in? More importantly, what was the actual identity of the grandmother whose legacy now entangles Satoshi in a web of otherworldly worship and unforeseen obligations?