Both have two lovers that go through a lot to be together. Amazingly sweet endings too. Both stories have an 'innocent' girl protagonist who finds herself in some rather interesting situations involving a guy. This manga has a few twists, which keeps it interesting.
Ever since Kuromi's father died four years ago, she's been left to take care of her ailing mother and two twin brothers by herself. However, one day Kuromi's life changes forever when she comes across a hurt man in an alley and nurses him back to health. His name is Hakuron, and he's the young leader of the Dragon Lord Association - a Hong Kong mafia organization. After stealing Kuromi away to Hong Kong, Hakuron is determined to make her his own; and after falling in love with Hakuron, regardless of his sins, Kuromi is happy to oblige. Her new life within the mafia won't be easy, as rival organizations, Hakuron's old playboy lifestyle, his fiancée and a brand new school situation threaten to stand in their way - not to mention, Hakuron's insistence on taking what's his, even Kuromi's body...
They both have the same sort-of "love at first sight" opener. The male lead in both is from a different country and has deep connections to that country's mob and gang cartels. The male lead sweeps the female lead off her feet and brings her to his country - and then the stories take off. Essentially, they start out in a same way and have very similar themes (also both are a little smutty).
Twenty-year-old Maiko Ninomiya has just returned to university after being held back a year; she rescued a dog from being hit by a car and was struck herself, missing half a year of school in the process. She's been having strange, erotic dreams about an unknown man since the incident - that is, until she meets the man in real life! His name is Yukiya Nagase, and he's the new literature professor at school. Maiko soon discovers that the woman he loved, Haruka, gave her blood during the accident and later died, leaving behind Yukiya and a young son. As she carries Haruka's blood inside her, Maiko feels and remembers some of the same things as her benefactor, and now Yukiya wants Maiko for his own as a way of communicating to Haruka. Together, the three begin to live together and their feelings deepen. But does Yukiya see Maiko as more than just a memory of Haruka?
Both have two lovers that go through a lot to be together. Amazingly sweet endings too. Although slightly different conflicts,there is still a development of the two characters love as the story progresses.