Perhaps novelty is needed not so much by the actors as by the entourage, and the surge of hormones in the viewers blood will cause the fact that the couple abandoned solitude in favor of intimacy in a crowded place.
Ore no Imouto ga Konnani Kawaii Wake ga Nai Also known as Oreimo, it is one of the more popular incest anime, even though it does not have fanservice as much as Kiss x Sis does, it has incest elements that are worth putting it on this list.
However, we placed it lower on the list because it is not that similar to Kiss x Sis.
They decide to marry, but keep it a secret and keep on student life.