Vampire Vixen

A half-Vampire and half Succubus woman sent a love letter to humans to meet in the gymnasium. But until then, the woman asks for help to provide a life energy for food, The man also received it by giving it Sperm for nutrients. (Source: Nekopoi, translated)

Doukyo Suru Neneki

Yuuji Fujiwara had an unlucky life. As a child, he was blamed for a vase he did not break, and he was fired from his job for a colleague's mistake. At the convenience store where he works part-time, Takamiya, a younger girl, blames him for mistakes made by others. When he returns home in a depressed mood, he is greeted by a strange girl. When Yuuji is puzzled, the girl reveals her true identity. It turns out to be a mucus creature that has been living with him for the past three months. The creature, which speaks human language and can change its shape at will, is in love with Yuuji. Yuuji is not at all pleased with the mucus creature's affection. In order to attract Yuuji's attention, the mucus creature changes its shape into Takamiya, the co-worker at his part-time job, and seduces him. (Source: MediaBank, translated)

Zton Jingai Animation: A Beautiful Greed Nulu Nulu

This hentai telling the life story of love between human and half human animal. (Source: Nekopoi and Has Been Translated and Edited)

Kohakuiro no Hunter THE ANIMATION

Based on the erotic game by Sky Rocket. In the deepest parts of the most dense forests lay an unexplored region of a planet. Those with dreams of fame and fortune venture to the pioneer towns in hopes of hitting it big. Unfortunately for most, this region is dangerous and unexplored...for a reason.