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Identität: It's a fanmade MSA anime and manhwa.
Persönlichkeit: Masashi is the leader of Tokyo's vampire coven.
Hintergrund: In Tokyo, Japan, an 18-year-old young woman named Yukiko was chosen as a strix, indicating that she has very especially sweet blood and the antagonist who is a vampire named Masashi keeps frequently visiting her older brother named Ryounosuke's new home and his girlfriend who is his wife named Chisato. To understand how it came to this and why the antagonist Masashi was frequently visiting her 23-year-old older brother Ryounosuke's home after he married his own wife Chisato, we have to go back from the beginning. When Yukiko was born in the Tsurunai family, there was a snowstorm, a snow blizzard. When she was 5, her ability test ceremony came and she became a strix, indicating that she has very especially sweet blood. Afterwards, the ability test ceremony went well. At the age of 7, she went to elementary school and she made a lot of new best friends. At the age of 14, when she was in middle school, her older brother Ryounosuke who is 19 got himself a girlfriend Chisato and she and Chisato became good friends too as well as she became friends with two girls named Akari and Emiri who are 7-year-old twin sisters, indicating that Yukiko is always good at making friends. Then, once she graduated high school at the age of 18 not long after Ryounosuke and Chisato who are 23 got married, making Yukiko a sister-in-law. But, then, three weeks later, not long after they got married and Chisato is pregnant with his first child that is a girl named Himari after they got married and they own a male Hokkaido dog named Jiro, the antagonist Masashi started frequently visiting Ryounosuke and Chisato, he appears to be a normal charismatic man at first and talk about the unborn Himari then Yukiko. One day, he frequently visited, so, Yukiko found this a bit strange and told her friends Akari and Emiri, "We gotta find out about this Masashi fellow." And Akari said, "Well, we don't know, but, ever since they got married, he's been frequently visiting them." What happens next?