Rudra

"To his friends on Earth, Enzo Amaris is someone who loves to laugh and goes out of his way to help people.

To his parents, he is a lazy slob. Sometimes a bit soft, meek and full of fear, but a good person overall.

To the people of the other world however, he is the personification of wrath and insanity: a whirlwind of homicidal rage whose actions are incomprehensible. There's a smile on his face as he rips people apart from limb to limb.

Some say his power comes from a System he can design himself.

Some say he has ties to the very Empire of Lust that humans have been summoned to destroy.

But enough of that. What do you say? Who is Enzo Amaris?"

The curly-haired boy laughed, a mysterious grin on his face.

"Why don't you find out?"

Updates M-F

What to expect: A DIY system which he can completely design to his liking. MC who starts off normal and then slowly gives into his bloodthirst. Dual life on Earth and isekai.