The title's closer to: "A Story about a Boyfriend who Gives the Impression that He May Have Not Taken Care of His Hygiene At All and May Have Relentlessly Read Ero-Manga".
I took too long to decipher this title.
There's a possibility I'm about to give too much credit to this mangaka, but they have a work that's currently being serialized that is extremely well received on this site, so it's probably worth the risk. It's also possible that I'm wrong. Either way: I think the comic being a singular page and having no context is meant to stimulate discussion on what's happening.
As for the narrative itself, I think this is supposed to be a vignette about two teenagers whose expectations have been heavily skewed by media, but find that the same fictional templates playing out in real life have an entirely different feel and mechanism. It's obvious this is the case for the boy, but I also think the girl is similarly affected while suffering different results.
The girl's expectations are shaped by manga-- she figures that inviting a boy to her room would elicit a mood for sex, and expects that sex would necessarily follow, but is surprised that she doesn't actually want to have sex despite the set-up being familiar to her (that's what I get from her internal monologue in the first panel, anyways).
Part of that is doubtless because she's reacting to the way that the boy is moving; having his expectations skewed by ero-manga (as per the title), he acts like a fat bastard while probably not minding his hygiene (according to the title) or his girlfriend's protests. In ero-manga, it's not uncommon for one character to "inflict" sex onto another rather than for two characters to "have sex", and it's not uncommon in those scenarios for the fact that one party was violated to be obviated in the narrative by 1) the fact that they come to enjoy the sex midway or in retrospect, or 2) an indication that they were never in distress to begin with. This all also occurs with a provocative and scenaristic flair, without clearly indicating how "ugly" and injurious rape often is.
Pornography in general contributes to shaping the minds of men and women to objectify their partners, using them as tools to achieve sexual satisfaction without considering their needs-- regardless of whether they intend to harm, or care about whether they do.
The girl taking partial responsibility for "turning her boyfriend into a rapist", despite his lack of blaming her for any lack of self-control and without her referencing anything that she did to be clear, nothing would justify rape, may be a reference to the glamorization of the lack of sexual restraint male leads have when interacting with heroines in media (pornographic or otherwise). The appeal, in fiction and imagination, is that one is seen as so attractive that others can't restrain themselves with them, leading to them seizing such a person.
Also potentially implicated in the girl's taking partial responsibility is the idea that men are slaves to their sexual urges; while degrading to men, it also degrades women by proposing they bear responsibility in "provoking" men to rape them.
