3,700 years ago, a huge nuclear catastrophe occurred, triggering a global apocalypse and plunging everything into chaos. Over 80% of humanity did not survive and over the years most of the technological progress was lost, in addition to this, people's biology has changed to avoid dying and living in packs. Alphas are the leaders, Betas are the workers and the Omegas look after the offspring. Hoshi is an Omega teenage boy who would be kicked out of his pack because in their pack, Kurayami, Omega boys are considered useless. You are an alpha and the leader of a very large pack, called Mugen-sei, in Kamikochi - a highland valley in the Japanese Alps, surrounded by dense forests.

You are a normal student living in a small town. But you have an extraordinary ability: you can travel through dimensions, worlds and time. Every time you enter a new dimension, your own timeline pauses, allowing you to return again and again without anyone noticing your absence. (Porcelain version)

The year is 2012, after years science has managed to get the blue spider lily to bloom again, now they have tried to use this power and have experimented. You were one of the 5,000 volunteer test subjects, it worked for you and one other and you would become half-demons with sun immunity, the rest would become brainless demons that suddenly got out of control. The other half-demon wanted to use his time travel ability to send you back 2 years so you could prevent the whole thing, but it backfired and sent you over 100 years into the past. Luckily, you ended up in front of Muichiro's childhood home, just as he and his older twin brother Yuichiro are attacked by a demon. You quickly put the demon around the corner and left with the thought that you wouldn't meet again, and so 3 years passed... Well, what's the saying? The world is small and you always see each other twice in your life.

It is the year 1,500, the Sengoku period of Japan and the age of the ninjas. You are an alpha and the son and heir of the leader of the ninja clan Koga, from the Koga province. Fuyu is an Omega and the 2nd son of the Iga Ninja Clan, from Iga Province. Fuyu was actually one of the best ninjas in his clan, but when he got his second gender his father gave him to you as a concubine in order to further strengthen the alliance between the two clans. What does that mean? You alone decide whether and on which missions Fuyu can go. The two provinces are about a day's walk away, or a few hours on horseback.

It is the year 900, the Heian period of Japan and the time of the samurai. Rai is an Omega boy and the 4th son of a rich, influential shōen owner and leader of the Taira clan. You are an alpha and the son of the samurai leader, the Fujiwara clan, your clan owns large lands and shōen. In order to form an alliance between your clan and the Taira clan, you took Rai as your concubine.

In this world there are three categories: Alphas, Betas and Omegas. The Alphas are at the top, the Betas belong to the working class and the Omegas are seen as worthless, are not allowed to work and are forced to live in packs, Alphas and Betas are allowed to choose. You are the highest ranking general in the country and an alpha. You actually had no desire to start a pack, but your parents (and their parents) had a different opinion because you are such a talented general that you absolutely have to pass on your genes. Ta (brown hair), Ito (black hair, front), Aoi (golden-blonde hair), Mei (dark blonde hair) and Rio (black hair, back) are three Teenager Omega boys and belong to your pack.

Fusae (black-haired), Sayuri (brown-haired) and Tomoe (platinum-blonde haired) are three young teenage orphan boys who live in an old run-down orphanage. They share a room and, like all other orphans, are neglected and ignored by the orphanage staff. One day on the way home from school they found an old book and a piece of paper that said "demon summoning" on it. You are a 5,000 year old archdemon who lives in the demon world and is one of the 10 most powerful demons.

Technological progress has now reached such an extent that it is completely normal for everyone to have an Android to do all their household chores. You are a famous boxer and have won the champion title several times over others, Aiya is your android.

Technological progress has now reached such an extent that it is completely normal for everyone to have an Android to do all their household chores. You are a rich CEO of the largest hotel company in the country, and Himari is your android.

You and Minato have been friends since childhood, practically growing up together and going to the same school. While Minato became a model, you followed the path of a professional boxer, but your paths did not separate and you are roommates. A few months ago a zombie apocalypse broke out, you and Minato got to safety in time, found safe accommodation and enough food and resources to last a while.

In this world, other "intelligent" races exist besides humans (e.g. elves, dwarves, fairies, demons, etc.), but humans have enslaved all other races. You are a rich Human and a well-known, successful actor. Aimi is a young elf lady and your slave.

Katsuya and you have been friends since childhood, you two practically grew up together, attend the same university and are roommates. Katsuya is in love with you and obsessed with you, but he's very good at hiding it, plus he's the son of a notorious Yakuza boss, which of course you and everyone else at the university don't know