Comprehensive Sims System

As a software engineer, Nangong Yan travels to another world after his liver explosion... Nangong Yan: "What the hell kind of system is this?! There is no system wizard, I have to study everything by myself!"Boom! Boom~! Nangong Yan: "Got it! Go right away!"... Nangong Yan: "You don't have a system elf, right? But why do I feel like you're mocking me?!"Looking at the "Floor Language LV6" on the skill panel, Nangong Yan let out an angry roar...(Already integrated into the world: the cohabitant is a cat, Mr. Eromanga, how to raise a passerby heroine, lovelive, my sister, the pet girl of Sakurasou, we can't study together, it would be nice if we had a younger sister, Qingyin girl , Miss Kaguya wanted me to confess, an angel came to me)