A man who was once called the world’s strongest agent ended up becoming a teacher after his retirement, to train a new generation of agents. After many years of training his disciples, he was killed at the age of 60 by a secret organization’s ruse and was reincarnated in another world with his memories intact. Though he was surprised by the existence of magic and the strange species in that world, he quickly adapted to his condition as a newborn and took advantage of it. He acquired special magic and gained a massive amount of strength thanks to his rigorous discipline, in order to reach his goal: Resume his career as a teacher which he left halfway through in his previous life. This is the story of a man, who, based on the memories and the experiences of his previous life, became a teacher who travels through the world with his students. Adaptation of a Light Novel. ---
Imaizumi is a high school boy who lives alone in his apartment for a reason. He has a secret that he can't tell to anyone. And the secret is that he lives with the top three Gyarus (gals) of his school, Hamasaki, Kurumozaka, and Sasaki. He spends his day playing, talking and getting physical with these Gyarus, all of whom have a quirk or two. Imaizumi-kun is getting more and more addicted to his lazy, naughty and free "youth"...?
Kai, who comes from a family that specialized in dark-style occupations, sought even greater strength. One day, he saved the fourth royal princess who was under attack by monsters. This was the the trigger for him managing to join an academy that specializes in training people for holy occupations. He endures training so incompatible with his physical constitution that it could make him faint, all to become the polar opposite of the strongest dark knight—the Kingdom's strongest holy royal knight, The Royal Paladin. An occupation-change drama of a genuine dark knight begins!! "Now let us enjoy our deathmatch—to our hearts' content"
When Kim Minseok wakes up in a hospital, he's stunned to find two handsome men both claiming to be his lovers. Dismissing it as a prank, he prepares to leave, only to see an unfamiliar face in the mirror. Minseok is now in the body of Seo Hayoon, an evident two-timing schemer. Who was Seo Hayoon, and how did Minseok end up in his body? More importantly, how will he navigate this tangled web of relationships?
Aijou experienced 100 heartbreaks during Junior High. While praying in a shrine, the God of Love appears, saying that Aijou will meet 100 fated girls. If their relationship with him fails, all the girls will face an accident and die. Now it's a matter of love or death, and it's up to Aijou to decide.