Sun-Ken Rock ....... totally worth it!!!

                                this manhwa is FOR 18+

                                       rating, 9.8/10

The story revolves around Ken, the main protagonist who wanted to become a police officer just like the girl he loves; due to unforeseen circumstances, he becomes the head of a local gang and tries to hide it from Yumin (a self-exiled daughter of a Yakuza that became a Korean police officer). This gang is later renamed The Sun-Ken Rock Group. At the first, the gang only consisted of few members and even doesn't have a base. As the manga progresses The Sun-Ken Rock gang becomes bigger as they recruited new members and take over other gangs' territories and investments. The Gang acquires an MMORPG company, a large casino, one of the biggest television media companies in Korea, as well as garnering political favors (making them the biggest gang in Korea). 
Main Characters

Ken Kitano 
A high-school delinquent and the primary protagonist who drops out of school and leaves Japan in pursuit of his love, Yumin. While in Korea he lives his life as a shut-in for an entire year being unable to find an actual job. After saving an old man from being killed by loan sharks, he was scouted and invited to join a local gang(gondal) to work under Tae-soo as one of his underlings. After fighting against Tae-soo, he was offered the position of boss instead. He initially declined since he wanted to join the police force alongside Yumin but Tae-soo eventually manipulates him into taking the position. His strength and sense of justice earns him the loyalty of his gang and the local community. As the leader of the Sun-Ken Rock Gang, he often hides his true identity from others (ex.: he tells Yumin he works at a video game company as a cover). Ken's parents were killed during a Yakuza war when he was 13. The character design of Ken is heavily influenced from Vash of Trigun Manga.
Yumin Yoshizawa 
Ken's love interest, a girl that left Japan to become a cop in the department in charge of organized crime. Her true name is Yumi and she is actually Japanese. She hates gangsters, later it is discovered that she is the daughter of a Japanese Yakuza Boss that killed Ken's parents. Her hatred of gangs is due to her mother and sister being killed by other Yakuza when she was young. As the daughter of a Yakuza boss, she has mastered some martial arts and is a very capable fighter. She also has feelings for Ken while not knowing he is an underworld boss. Later she was kidnapped by Kim Ban-Phuong's gang who hold her as their hostage who waiting for Ken and his gang to fight

          so read it
                   official site

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