Manga Like Dog-han Romance

My pet dog, who is like my child, turns out to be the heir to a wealthy family? It's been a year since he adopted Janggun, who was abandoned. But this special guy, well, not only became a family to Do-Hun, who was lonely, but he also brought him a fateful love called 'Lee Chae-Young'. However, Chae-Young was definitely not an easy target. Just as their love is about to begin, a second generation chaebol suddenly appears and says he wants to take Janggun away. And Janggun's surprising secret is revealed. Will Do-Hun be able to protect both his love and his family? (Source: Naver, translated) Note: Includes six extra chapters.