Adventure
If a character in the story goes on a trip or along that line, your best bet is that it is an adventure manga. Otherwise, it's up to your personal prejudice on this case.
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Shin Megami Tensei Apocrypha: War of the Dove
There are no chapters -
Mizu no Tomodachi Kappaman
There are no chapters -
Dickhead (Censored)
There are no chapters