He Gets on His Knees and Begs Her Just to Hear Her Call Him “Hubby”

(Possessive love / mutual firsts / seven-year age gap / no rivalry between women, only rivalry between men / obsessive male lead who can't live without the female lead) They were siblings, but not related by blood. Gu Wan couldn't accept that the man she'd called her brother for years had developed those feelings for her. He stole her first kiss and took away her freedom. He cried and begged her not to run, saying he was afraid he'd die while chasing after her before he could find her... (The male lead is involved in the criminal underworld. This deeply troubled man slowly learns how to love. I'm not good at writing blurbs, so if you're interested, give the story a try. Happy ending.)