Theme

There are a lot of difference themes. I will tell you the main themes.

 * Bishoujo
 * Bishounen
 * Ecchi
 * Harem
 * Historical
 * Male Harem
 * Martial Arts
 * Mecha
 * Military
 * Monsters
 * Real Robot
 * Samurai
 * School
 * School Life
 * Seinen
 * Shounen
 * Shoujo-ai
 * Shounen-ai
 * Space
 * Sports
 * Tennis
 * Vampires
 * Wars
 * Western
 * Yakuza
 * Yaoi
 * Yuri
 * Zombies