"Vampire Ace" is a youth fantasy series that constructs a real world ruled by unknown vampires and werewolves behind the scenes. This article is the first part of the series, "Love Song Under the Blood Sakura", which tells the story of the vampire team Ace, which belongs to the three major blood clans [Black Green Blood Clan]. Ace, which has only five members, failed in a mission to retrieve the key fragments of the vampire elders. One of the members, Yingzi, was lost along with the key fragments. I originally thought that Yingzi was captured by the [Bauhinia Vampire Clan], but I didn't expect that she was actually rescued by a high school student, Han Chuanxia. The injured Yingzi lost all her memory after waking up, and Chuan Xia had to take on the responsibility of taking care of her, and named this cute vampire girl of unknown origin Xiao Ai. From then on, the two not only lived together, but Chuan Xia also took Xiao Ai to school, and many hilarious things happened... But something unexpected happened. It turned out that not only the Black Gelin vampire clan and the Bauhinia vampire clan were secretly looking for Ying Zi's whereabouts, but even the vampires [Black Devil Party] and the human [Exorcism Alliance] were also in the key fragment... Can Chuan Xia and Xiao Ai overcome all difficulties and realize a love that transcends races? And the even more incredible ending is that it turns out that Sichuan Xia...