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)

Misaki Akane, a high school girl who live by herself because her parents are too busy with their job, rented a room just to find there's a mistake on the contract and force her to live with Hazama Ken, a salaryman, until another room is vacant. 
 
Unbeknownst to them, the mistake is a start of such an unexpected romance in their lives...

Episode 1 - Seikatsu-bu e Youkoso 
"Hey Shouta, help me set up this new club idea I've got... it's called the Sexual Help Club!" 
 
Episode 2 - Chichi no Chihare 
In the past he used to make fun of her for her flat chest, but she has been drinking her milk and now has legendary tier milkers!

Anime adaptation of an adult manga by TANA.

King Bee