Well, you could try using poster putty. It sticks the manga to the wall and is gentle when removed. Another idea is to get a free-standing display frame and place the manga in it near the wall instead of attaching directly to the wall.
To make a manga wall, pick a wall with enough space. Gather a variety of manga-related items like wall decals, canvas prints, or cutouts. Plan the layout before attaching them to ensure a balanced and attractive look.
Hentai manga and a wall have no typical or standard connection. It could be that someone has a very odd and specific idea of combining the two, but that would be quite rare and unconventional.
A hole in the wall porn manga often features graphic sexual scenes and may push boundaries in terms of vulgarity. Such content is often not suitable for public consumption and may have negative impacts on viewers' minds.