The protagonist begins to get involved with the most beautiful girl in school, who is famous for her cold attitude, and slowly becomes attracted to her.

That protagonist finds himself in a consulting relationship with a plain girl in glasses at his part-time job.

He doesn’t realize that the girl he is consulting is the same girl he is in love with, and just keeps telling her about his growing feelings while continuing to fall in love with her.

The heroine realizes that the person he is in love with is herself, and although she is embarrassed by the protagonist’ feelings, she gradually becomes attracted to him.

A spin-off of the series “Tondemo Skill de Isekai Hourou Meshi” told from Sui's perspective.

Jang Young-guk’, who achieved great success as a supporting actor.
Received the first and honorable Best Supporting Actor Award at the Acting Awards.

However, on that day, his mother passed away…

Horrified by the death of his mother, whom he neglected for years, Young-guk decided to end his life…

Before his death, he longingly recalled the warmth of his mother and the peaceful memories of the past. He regretted turning his back on those memories…

At that moment, he suddenly regressed to his childhood…

“I regressed, to that past I missed”

“As an inescapable fact, this life is just…”

Once again, the story of a person who wants to live as an actor begins.
Will he be able to live a happy life unlike the previous life?

Shuichi, a high school student, ended up marrying his childhood friend whom he thought was a boy. At their reunion after 10 years, his childhood friend Yuika had transformed into a beautiful girl, which initially made Shuichi quite nervous. However, as time passed, he gradually grew accustomed to the sense of closeness as best friends—and thus, their love story as an ideal couple with a charming touch of innocence begins!

From Wikipedia
In the manga and anime, Tiger Mask (whose real name was Naoto Date) was a feared heel wrestler in America who was extremely vicious in the ring. However, he became a face after returning to Japan when a young boy said that he wanted to be a villain like Tiger Mask when he grew up. The boy resided in an orphanage, the same one that Tiger Mask grew up in during his childhood. Feeling that he did not want the boy to idolize a villain, Tiger was inspired to be a heroic wrestler.

The main antagonists in the manga and anime was Tiger's Cave, a mysterious organization that trained young people to be villainous heel wrestlers on the condition that they gave half of their earnings to the organization. Tiger Mask was once a member of Tiger's Cave but no longer wanted anything to do with them, instead donating his money to the orphanage. This infuriated the leader of the organization and he sent numerous assassins, including other professional wrestlers, to punish him.

Most of the environment and characters were fictitious, but real-life pro wrestlers Antonio Inoki and Giant Baba were included in the manga and anime as well.

In the Mahou Shoujo Lyrical Nanoha A's Portable - The Gears of Destiny - Material Musume. series:

V.1 - Mahou Shoujo Lyrical Nanoha A's Portable - The Gears of Destiny - Material Musume.

V.2 - Dash

Jogo has a crush on his classmate, Miyato.

One day, they unexpectedly end up walking home together after school. When Miyato is about to be hit by a truck, Jogo throws himself in harm's way to save her. In the final moment before impact, Jogo wishes he could have told Miyato how he felt.

But then he hears a mysterious voice saying, "You can do it over. This time, don’t have any regrets."

When he wakes up, he finds himself unharmed, lying on the ground, with a different version of Miyato beside him — she looks the same, but her clothes and hairstyle are different...?

Isshiki falls in love with a maiden who is pure and innocent, but he has been possessed by Asmodeus, the demon of lust.

The demon tries to arouse Isshiki by stimulating the sexual desires of the girls around him in every possible way. However, in order to exorcise the demon and avoid the girls' suspicions, Isshiki must never get excited, no matter how lewd they may act!

“How can I stand this...!"

Eros vs purity, the ultimate battle love-comedy begins!

Suzuki Saburo is the typical isekai MC. A high school boy who started to get into cooking after getting an injury during baseball, he suddenly found himself in another world one day. With the only thing on his person being his custom knife, he wandered a desolate prairie for three days before falling unconscious.

When he woke up, he found that a nomadic tribe of elves took him in. However, there’s one big problem — the tribe has terrible cooking. Can Saburo help teach the nomadic elves the true meaning of deliciousness?

High school student Hojo Saito married his classmate, Sakuramori Akane, the girl who’s his worst enemy in school.

“If you tell the rest of the class we’re married, I’ll kill you”

“I don’t want them to know either. There’s no point in that.”

Their newlywed life wasn’t going so well, and they were constantly at odds. However, as they progress through their daily lives, the distance between them closes, they have more enjoyable moments together, and they gradually come to understand one another.

Saito learns about Akane’s cute side, which he never saw before, and Akane gradually began to recognize the feelings that she’s been keeping inside…

The heart-throbbing newlywed life of two people who just can’t seem to be honest with each other begins here!

The end of the world is coming, and human beings have awakened their superpowers and fought against the monsters in the towers. However, there is a strongest BOSS sitting at the highest point of the tower – Demon King Jiu Ming. He is an insurmountable barrier for humans. One after another, the brave men always thought that they were the protagonists in the story, but the halo of the protagonists never came to them. When the protagonists lose their protagonist aura, they no longer are the protagonists.

Christmas season.
Hasegawa Yūta found himself single after breaking up last month when his girlfriend had cheated on him. And it was only a few days until Christmas!
After an everyday conversation with his female friend, Mino Ayaka, Yūta met a beautiful girl clad in a Santa suit—In a lane full of couples no less!
Her name was Shinohara Mayu.
Will this encounter with Shinohara turn out to be the Christmas present for Yūta ?

An invincible brother who's willing to do anything for his little sister.

Asuma Sudou has always been a proud pervert, but he's sworn to give that up to chase the girl of his dreams. Having received a special invitation to enter the same all-girls school as her, he's planning to live his romantic youth to the fullest. But those plans are cut short when it turns out the school is a front for a secret organization dedicated to battling kaijin-monsters created when people succumb to their murderous impulses! The girls of the school fight using the relics of defeated kaijin, but when the bloodthirsty instincts sealed within threaten to overwhelm them, Asuma is the only one who can bring them back to their senses!

(From: Yen Press)

In modern Hokkaido a brown bear has appeared near an elementary school, so a member of the local hunters' association is dispatched to exterminate it. However he gets killed by the bear and wakes up in a fantasy world, armed with only the Remington M870 shotgun he had when he died.

The Arisaka sisters (Hatsune and Kazuki) and the Kagura siblings (Yuuji and Marie) lived next door when they were smaller. So close that they could climb onto each other's verandas from the 2nd floor. They would always play together until one day the Kagura siblings had to move.
It's been 10 years and the Kagura siblings are moving back! Yuuji's turned into a pervert and Marie isn't the crybaby she used to be?

After the war that took place in A.C. 195, each of the protagonists have gone on with their lives, and the gundams put into retirement. As the peace alliance with the colonies push through, a new menace threatens to shatter the peace, and the five gundam pilots are forced into action once again. Blind Target is originally a radio drama that got translated into manga. It is one of the possible events that took place between the series itself and the OVA, Endless Waltz. Other manga titles that also delve into the possible events between the series and the OVA are Battlefield of Pacifists and Ground Zero. All three remain unrelated to one another.

In the final showdown between the Demon King and the Hero, the latter used all his power to seal away the former. To exact her revenge on her father's nemesis, the Demon King's daughter, Hel, resurrected the Hero and planned to use him as her personal servant. However, the resurrected Hero is unexpectedly dazzling and dashing, and Hel's composure begins to waver. Will she ever be able to torment her new servant?

Mochizuki's high school life suddenly took an interesting turn when he reunited with his childhood friend, Tsukimi Kawaru, whom he had a crush on since they were in elementary. Through a coincidence accident, he found out that Kawaru is actually a wolf girl, who couldn't control herself around him. Because Kawaru broke her promise of keeping herself in check, her sister, Utsuru, decided to pull her back home, but Mochizuki didn't like that idea and he came up with a solution to allow Kawaru to continue attending high school while keeping her identity a secret...

A graduate from the school of hard knocks, hit man Ogami faces his greatest challenge yet…middle school!