I'm worried about the uncertain future of my shabby apartment, where the door is barely locked. Even my classmates from university who break into my house without permission and make a racket are enjoying life to the fullest... One day, Shiina-san moves into the room next door, and she keeps inviting me to go out with her... She's a woman with a mysterious and sweet aura. I can't resist her sweet whispers that melt my eardrums, so I just do as she says and get lost in sex with her...