Darui Papyeon
Eugene, a doctor who was falsely accused and released from the hospital, now treats people illegally. He is targeted by Vladimir, the boss of a massive mafia organization, and is abused every night. Then one day, Vladimir is seriously injured, losing his memory.
"Why did it have to be you? Coming to you in such a critical situation... Isn't that proof of our special bond?"
(Source: Lezhin, translated)