Shortly before receiving a promotion, an executive is shot and killed - but God decides to reincarnate him in another world in a 15-year-old healer called Luciel... in a country where healers are hated. Seeing himself in danger, Luciel visits the adventurers' guild in search of protection, but is subjected to much more arduous training than he imagined, as well as being forced to ingest the mysterious "Substance X". Wait, what does that have to do with being a healer?! This reborn, masochistic healer begins his new life fighting for survival!
In the story, the protagonist receives a letter of confession, but without the name of the person who sent it, just a pair of panties. Now he has to find the owner of his beloved's panties, but ends up discovering that all the possible candidates are mega-perverted girls who want to somehow use him in their personal perversion.
"Do you want to stay with me... at the Video Game Club?" Keita Amano is an isolated, mediocre guy without any interesting personality traits, except his love of games. One day, he is approached by Karen Tendo, the prettiest girl in school and president of the Video Game Club. This moment changes Keita's life forever, and transports him to a romantic comedy with beautiful girl gamers... At least, it was supposed to be like that. But it's different with him.
The setting is a parallel world to Fate/stay night where the Great Grail mysteriously disappeared from Fuyuki after the Third Holy Grail War. After many years of silence, at the same time as the Holy Grail War would have taken place, the Yggdmillennia, a family of mages, openly declare their separation from the Mage Association and that they are in possession of the Grail. The Association sends fifty magicians to retrieve it, and all but one are instantly slaughtered by a mysterious Servant. The rest manage to activate the Great Grail's reserve system, allowing a total of fourteen Servants to be summoned.
After dying by a mistake of God, the protagonist ends up in a parallel world, where he starts his new life. His only possessions are the body God gave him back and a smartphone, which still works in this other world. After meeting several new people and forging new friendships, he begins to discover the secret of this world. He inherits the legacy of an ancient civilization and collaborates with kings of various countries on his carefree journey in this new world.
Iwatani Naofumi, an otaku like any other, finds a book in a library that transports him to another world. He is given the mission of becoming the Hero of the Shield, one of the Four Cardinal Heroes who will face the Waves of Catastrophe alongside the Heroes of the Sword, Spear and Bow. Excited by the adventures, Naofumi sets off on a mission with his team. However, a few days later, he is betrayed and loses all his money, dignity and respect. Will he find a way out of this desperate situation?
