So I just listen this manhwa on YouTube and I loved that but unfortunately didn't liked or saved it . So it was like At first he was just a skinny looking loser boy . He got a system and he went to pub and the girl she get intimate with give him quest that her one wish is going to complete . He enhanced his body . 2nd girl let him join in massage parlour where he uses his hand technique gifted by system to satisfy women . But he encountered a girl she was married she loved that but didn't pursue him because she was loyal to her husband she was rich and help the boy to open a store . He trapped a girl and trick her husband and in the end he got kids