Ijô kôbi: Yoromeku shikijôshû (2009)

The vampire sisters, Yuri and Sen, weave a serious yet alluring and erotic world. Yuri is aggressive, seeking men's blood to achieve ecstasy. Conversely, Sen struggles to abandon her feelings for humans and lives in anguish. Sen becomes even more confused after meeting a certain young man. However, her instincts are awakened, and she finally has sex, but her thirst is not satisfied...