Got A Great System! Narcissist On The Way.

The story is about a boy named Stein Heller who was transmigrated into a body of a boy in another world. After getting kidnapped, some old freaky scientist tried to run an experiment on Stein Heller but it failed with an explosion. Yet, Stein got a system and ended up transmigrating his soul into Roy Chester’s body, who died after being betrayed by his childhood friend who chose the hero over him.

What adventure Stein will have in isekai?

What kind of life he will get….!?

Read the novel if you are interested in a thrilling, perverted adventure of Stein Heller in another world!

Ntr here won’t affect the reader