MTL - Global University Entrance Examination - Chapter 7 Three violations

I became the Heavenly Demon’s dog.

Offered as a bride to Hades at the age of eighteen.

Pestered by evil spirits in the day, and taken advantage of by a perverted demon at night.

Pervert: “Dear, a night with you is worth more than gold.”

I leaned away as I clenched my teeth angrily: “Worth my foot!”

- Description from Novelupdates

“Breaking News! A 28-year-old IT worker beats three university kids to death with a spiked bat over a dog!”***Following the revenge, John took his own life in stubborn resistance, but that wasn't the end. He and his dog, Alfred, found new life after making a deal with an Eldritch God, Chuthulos.The duo reincarnates in another cosmos where Humans live an intricately connected life with Monsters as Tamers.However, in this perilous journey where his exposure to higher powers can lead to not only his death, but of the entire Eldritch Cosmos, John is not without help, for he receives the Rune of New Beginning, a power shaped into a system made from Eldritch Ancestor, to aid him.“So I can inspect all Monsters, eh? Awesome.”“Evolution Pathways? Cool!”“A private world where I can create biomes and habitats for monsters? A Monster Paradise?! Holy Land!”“Hey, what new function are you going to add in the next level up of the Rune, Chuthulos?”With all stacks on himself, John is determined to make the most of his new life with Alfred and his Pet Monster companions and keep his end of the bargain.

I became the childhood friend of the protagonist in a novel. The childhood friend who died from taking drugs.