Bird Island (2003)

The world's number one assassin has been reincarnated as the eldest son of a family of aristocrat assassins. In exchange for being reincarnated in another world, a goddess has imposed upon him one condition. "Kill the Hero who is prophesied to destroy the world." This was to be the mission in his new life. The synergistic effect of the vast knowledge and experience he gained that made all manner of assassinations possible in the modern world, and the secret techniques and magic of the fantasy world's most powerful family of assassins turn him into the greatest assassin of all time.

An elite group of young warriors trained in morals and martial arts finds love and friendship in Silla during Korea’s ancient Three Kingdoms period.

Sorata Kanda, a high school sophomore living in Sakurasou, the den of their academy's problem children, spends his days being dragged around by the strange residents, swearing he's going to escape Sakurasou one day.

After being pulled into the webtoon world created by her father, a surgical resident gets entangled in a murder mystery involving the story's hero.

Shadowbrokers are those who go unnoticed, posing as unremarkable people, when in truth, they control everything from behind the scenes. Sid wants to be someone just like that more than anything, and something as insignificant as boring reality isn’t going to get in his way! He trains in secret every single night, preparing for his eventual rise to power—only to be denied his destiny by a run-of-the-mill (yet deadly) traffic accident. But when he wakes up in a another world and suddenly finds himself at the head of an actual secret organization doing battle with evil in the shadows, he’ll finally get a chance to act out all of his delusional fantasies!

Thirty years ago a strange phenomenon called a "spacequake" devastated the center of Eurasia, claiming the lives of at least 150 million people. Since then, smaller spacequakes plague the world on an irregular basis. Shido Itsuka, a seemingly ordinary high schooler comes across a mysterious girl at the ground zero of a spacequake and learns she is one of the "Spirits" who are the real cause of the spacequakes that occur when they manifest themselves in the world. He is recruited to make use of his mysterious ability to seal the Spirits' powers thus stopping them from being a threat to mankind. However, there is a catch: to seal a Spirit's power, he must make her fall in love with him and kiss him.

Nobunaga was a teacher who was waiting for that kind of dating sim event to happen in real life. One day, a 14 year old girl named Kicho appears in front of him, saying that she's his wife?! Apparently she came from the Warring States era and seems to have mistaken Nobunaga for the Oda Nobunaga and tells him that she wants to have his children. An age-gap love comedy featuring a teacher with a dating sims brain and a princess with a warring states era brain!!

Considered a genius due to having the highest grades in the country, Miyuki Shirogane leads the prestigious Shuchiin Academy's student council as its president, working alongside the beautiful and wealthy vice president Kaguya Shinomiya. The two are often regarded as the perfect couple by students despite them not being in any sort of romantic relationship.

Natsuo is a high school boy who is experiencing the crushing despair of unrequited love. To make matters worse, the person he is in love with is his teacher, Hina. In an attempt to lift his spirits, he attends a mixer where he meets a girl named Rui. The two sleep together, expecting never to see one another again, but fate has other plans. His life suddenly becomes more complicated when his father comes home and announces he has remarried a woman with two daughters whom Natsuo has met before: Hina and Rui!

Denji has a simple dream—to live a happy and peaceful life, spending time with a girl he likes. This is a far cry from reality, however, as Denji is forced by the yakuza into killing devils in order to pay off his crushing debts. Using his pet devil Pochita as a weapon, he is ready to do anything for a bit of cash.