You can tell it is a relatively small group of people with fairly rustled jimmies that are a part of the review bombing. Just me leaving my score raised it by .04 points.
there's almost the same amount of 10's than 1's so the "score bombing" goes in both sides and gets neutralized, nothing unusual, in a side note this type of "low effort work" is a true slap in the face of real manga artists...
These are twitter memes, not published manga. Mangaka actually love them. They also help artists connect with each other and dip their toes into the world of webcomics. Unlike western comic book artists, mangaka are overworked (3-4 hours of sleep per day for weekly magazine is common), are paid peanuts (unless their work gets super popular) and their works can get axed very easily, without prior notice. They often suffer from chronic back pain too. This often discourages youngsters from entering the industry and self-published webcomics are reinvigorating interest in it. However, even these take a lot of time, hard work and dedication so memes are a nice way to polish one's talent and test the waters before committing to a project.
In this manga we learn that licking teeth counts as a French kiss apparently.
As an aside, getting real tired of the whole "turning a gay person straight"/"turning a straight person gay" thing. I know that it's a fetish for some people, but it's also really creepy.