The Mask of All Realms

I fantasized that the anime I liked when I was young could be interoperable, and I wanted to make up for the regrets in the anime. I accidentally got the key to travel through dimensions. How would I change it? What was the opportunity for me to get the key? The boring and boring life in real society made me miss the passion and emotion I felt when I watched the anime in the past. Therefore, I wanted to record the intense stories that these good works that I had imagined would produce when they collided together. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.