From the Grave and Back Manga

A brief description of the manhwa From the Grave and Back:

“Hey, do not get confused. You do not know your right location ”
This has been the dagger which hurt the most.

A child of a rich family with a fast mind.
But god did not give him everything.

A close incurable genetic heart disorder
He did his best to be able to deserve the esteem of the folks around him.

However, his dad, the chairman, along with his relatives never took him seriously.

This was when an injury suddenly struck him.
And…
He awakened from the body of the badly wounded pupil, Kim Cheol Min.