In traditional medicine, morning glory aka Asagao, are commonly used as laxative. But the seeds can be used to induce hallucinations and some people use them as recreation drugs so they are banned in some countries.
Even in a manga like this, there are still people making perverted comments , and I make sure to stay away from those ecchi harem manga. It is hard to avoid the perverts whose mind is filled with nothing but dirty thoughts. Dirty jokes aren't funny, they are repulsive.
@FStubbs How about when it is inside of you? Seriously, this is not a hentai. You are a disgusting pervert. Go read a hentai if you like those kind of things.
@Darkmeep How can you misread something like that? Are you an immature boy in puberty that only capable of dirty thought?