tl;dr: A manga with no substance whatsoever but decent comedy centered around awkwardness.
This manga is about a young woman named Izumi who goes to visit her art now retired art professor. The reason she goes to visit isn’t entirely made clear, but she seems to want some sort of emotional support. Her professor may have been the type that was able to provide such support when he taught her, or maybe he never was and it was all in her head. However, he clearly isn’t the type to be able to provide such support now. However, for some reason or another, she seems determined to get whatever it is she’s looking for and pushes him into letting her live with him for a summer. It’s not like he dislikes her so he doesn’t want to force her out, but at the same time he has no clue what she wants or how to deal with her. And to make things even more extreme, she discovers that he’s somewhat of a pervert that’s into various things including love dolls, which she finds creepy. Though at the same time, not creepy enough to leave, but rather something that she uses to constantly poke at him.
Thus, in the midst of a complete failure to communicate between the two, there are constant arguments about nothing at all in particular and a lot of awkwardness all around. And sometimes this awkwardness expands to include various other characters. This awkwardness is the core of the soft but steady comedy that exists throughout the manga, which overall is pretty solid and results in the manga being pretty amusing. Still, in the end nothing really happens. There are hints of background to both of them, but not enough to actually paint any sort of picture or flesh anyone out. There’s no character development. No relationship development. No plot whatsoever. There’s no moral. No message. It really doesn’t feel like the manga is trying to convey anything. Ultimately, the manga just ends. The art was pretty weak both in terms of style and quality. And for a manga so heavily focuses on fetishes and raunchy aspects, there’s very little ecchi.