Until The Full Moon Graphic Novel Volume 01 (Mature)

"(W/A) Sanami Matoh Marlo has a problem. On the night of the full moon, this half-werecolf, half-vampire undergoes a mysterious and terrifying transformation - he turns into a girl. Desperate for a cure, his parents call on Doctor Vincent, a long time family friend. But Marlo wants to keep his condition secret from Vincent's son, the vampire playboy David. Unfortunately, the secret gets out and a new problem surfaces: David is interested in Marlo's female form."