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These anime feature romantic or sexual relationships between two adults.

These anime explore the adult entertainment industry. Characters might be voice actors for an erogame, or work in the erotic film industry, or write hentai manga.

These anime focus on the afterlife. The anime might take place in Heaven or Hell, focus on purgatory and the judging of souls, or other topics that cover life after death.

These anime showcase a relationship where the characters are in two different age groups, based on societal norms. While not always the case, these characters sometimes must overcome challenges or societal stigma associated with the Age Gap.

Alcohol is the subject of these anime. The story might take place in a Bar, where beer, wine, or spirits are served to patrons. Characters in these anime might run a brewery, or are sommeliers, alcoholics, or simply enjoy the experience of drinking alcohol. These anime may offer step-by-step Recipes for how to make cocktails or alcoholic beverages.

These anime take place in China during ancient or imperial times, or are set in a world similar to ancient China. Some works may be influenced or inspired by famous Chinese novels such as "Romance of the Three Kingdoms" or "Journey to the West", Chinese mythology, or historical figures from Chinese history. Common themes involve the happenings within the imperial court, waging war and forging political alliances, dynastic politics, and palace intrigue. Ancient China is a common setting for Wuxia titles.

Androphobia is defined as an irrational fear of men. In these anime, characters with the disorder have extreme reactions to the men in their lives, from panicking to having an intense allergic reaction to anything in between.

Winged, haloed angels from heaven are the focus of these anime.

These anime show one or more instances of animal abuse: animals might be denied their basic physical needs, killed without need, or tortured for pleasure.

An Arranged Marriage is a type of marital union where a third party selects the bride and the groom, rather than the two future newlyweds selecting each other for love or other reasons. Characters in these anime face, or are in, an arranged marriage.

These anime are based on Mobile Games: games that you can play on your phone or other small portable devices.

These anime are based on an Otome Game: a story-based game targeted at a female audience. Otome Games are usually visual novels or dating sims, but also can be video games.

These anime are based on stories or parables in a religious text such as the Bible, the Quran, or a Buddhist scripture.

These anime are based on video games that can be played on consoles, on the computer, or in specialized machines such as arcade games or Pachinko machines. For phone and other games, see Based on a Mobile Game.

These titles are based on a Visual Novel: an interactive game with anime-style artwork and an abundance of static graphics. These computer-based games have minimal gameplay, and usually have multiple storylines and endings. Visual Novels are sometimes Eroges.

Characters in these anime participate in BDSM: erotic activities and fetishes such as bondage, domination and submission, sadomasochism, and roleplaying.

BL (short for Boys' Love) is a genre that depicts homosexual relationships between men. BL is the predominant term in Japan. In the West, the term Shounen-ai categorizes romantic stories that focus on emotional aspects of relationships, while Yaoi categorizes more of the sexual aspects such as Smut or explicit content.

In these anime, two characters' consciousnesses transfer into each other's physical bodies, whether by scientific or supernatural means.

These anime include frequent, explicit sexual content predominantly aimed at a male audience in Seinen, Yuri, or Bara titles. Sex is used as a plot device and is a primary focus in many of these anime. Like Hentai, Borderline H anime show prolonged sexual acts; but Borderline H anime censor genitalia and other elements with white outlines, mosaics, or opacity.

These anime focus on a romantic or sexual relationship between a boss and their subordinate. The bosses might be CEOs, company presidents, or simply the manager in charge. Employees might be secretaries, assistants, or simply a direct report.

These anime feature Siblings with a Brother Complex: they want nothing more than to ensure the well-being and happiness of their beloved brother, often to an unhealthy or even romantic degree. They're known to be over-protective and jealous of their brother's suitors.

These anime have themes related to the Religion of Buddhism, and may focus on the life of the historical Buddha or other historical Buddhist religious figures; or showcase different aspects of Buddhist life, such as learning the Dharma, or becoming a Buddhist monk or nun.

These anime take place in Catholic schools: educational institutions run by the Catholic church. Some may be All Boys Schools or All Girls Schools, particularly if they are Boarding Schools. Classes are usually taught by Nuns or Priests and have a religious curriculum based on Catholic doctrine.

These anime feature chief executive officers (CEOs). In businesses and corporations, CEOs are the Big Boss, the highest-ranking person who is ultimately responsible for making managerial decisions.

These anime have themes related to the Religion of Christianity. They may focus on the life of Jesus or other historical Christian religious figures, showcase stories from the Bible, or show other aspects of Christian life, such as becoming a priest or nun.