I Transmigrated Into the Game as the Luckiest Extra - Chapter 95: Main Story Begins 01- Terrorist Attack 2

On her engagement day, she accidentally had a one night stand with a stranger. Since then, she has been blindfolded and sent to sleep with him from time to time. One day, she found herself pregnant so she went to the hospital for an abortion. However, she was blindfolded on the operating table and sent to him again! Then, she discovered that the stranger was actually her ex-fiancé's uncle she met every day!“It's you!” She was so shocked.“Marry me. I'll deal with those who have bullied you and make them treat you respectfully.” He said.……Later, she asked him with her hands on the belly,“Darling, there is a question. What should our baby call you? Ex-uncle?”He remained silent.

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

Kang Min-hyuk, the loser of the checkpoint, gained a high-level magical civilization and everything changed.

I met the male lead in prison.