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From Lezhin:Go Siwon's dreams are constantly visited by the clever, beautiful Kang Jinha. In the dream, Jinha keeps on mentioning this "incident" that happened between them but Siwon can't remember anything! And how can it feel so real? Luckily for Siwon, hints about the "incident" start to appear and Siwon is able to regain his memory bit by bit. How will their relationship change at the end of it all?Original WebcomicOfficial Translation

Storyline fairly good, but the drawing style is ruff and not we're good

Original Webcomic

Poverty-strikened Yang Jinghua dies in an accident. The moment he wakes up, he seems ten years younger. At first, Yang Jinghua thought he was reborn. However a white-haired, rich and handsome man, named Duanmu Xi, reveals the truth. In order to stay in the world, Yang Jinghua must become Duanmu Xi's soul image and therefore, creates a soul contract that binds both their souls.