Within a Hollow Heart - Chapter 24: Volume 1, : "The Forbidden Key"

Suzuki, an adult programmer, suddenly notices that he’s been thrown into a different world while wearing a casual clothes at level 1. He gained high levels and treasures after using the 3 times use-disposable-magic, Meteor Shower, at once. After that he intends to do different world “sightseeing tours”?

He meets 3 beast girls, beautiful purple and black haired sisters, and an eccentric blonde haired elf girl along with various people during his trip. Although there are occasional fighting with demons and demon lords, this is a heartwarming fantasy story at heart.

Madeline Celeste d'Aumont is the first daughter of Duke Aumont and Duchess Louise-Marie d'Aumont who has been engaged to the Second Prince of Pays Des Abrutis since she was a child. The Second Prince decided to marry a woman closer to his own age and broke off the engagement to Madeline who was left with a broken heart and a reputation as being an unwanted woman even before she was an adult. The Duke decided to help his daughter regain her confidence and reputation by sending her to the Academy de L'échec.

Ito Aoi was the son of a Kendo master who ran a dojo in downtown Tokyo. One day while crossing the street to get some Yakitori, Aoi was hit by a delivery truck and woke up as the trash first son of Duke Montfort, Guy de Montfort. Duke Montfort also sent his son to Academy de L'échec only Aoi instantly recognized that he was now living in the world of an Otome Game that his sister loved to play and talk about all the time. Aoi recognizes that Madeline is the villain from the game. Aoi also recalled his sister saying that Madeline was terrible in the game, but is she really?

“Why is it that Emiya keeps showing up everywhere? Can you please stop summoning me already?!”The outlier of the countless Emiya, the last of the Knights of the Round Table, the conscience of Chaldea, the wielder of the Third Magic, King of the Lostbelt, the man Alaya can never have, and the sis-con deity: Emiya Sakatsuki.***When Shirou Emiya, in the dungeons of Ainsworth Castle, summoned a soul from another world, the young man holding the Fate Compendium began his journey.He started his journey in the world of Fate/Zero; on a planet where the Root has dried up; a Holy Grail War involving fourteen Heroic Spirits; the Grand Order set in motion to save humanity…Keep going like this, a traveller from another land—Until the moment the loop of fate closes.“I just want to chill at home like Merlin! If this keeps up, I'm going to end up split into countless pieces sooner or later!”“Aren't you already split into pieces now, Onii-chan?!”

At five years old, the child from the metaphysical family is about to leave the mountain, and the bigwigs of the capital city have come out to see him off.What's so great about a little dumpling?Yun Xiaoqi innocently spreads his hands, claiming he never intended to show off his powers; his simple wish is to be a good child while subtly dominating all sorts of spirits.Many oppose him during this time, and the “Little Celestial Maiden” Yun Ying teams up with various metaphysical leaders to continuously challenge him, only to be soundly beaten, losing face.Finally, the bigwigs bow down in reverence: it’s we mortals who were blind and offended the little ancestor!***The news of the little dumpling ruling over the metaphysical world reaches the Nether Realm.The Lord of the Nether Realm frowns: this milky little master must be the youngest and most temperamental special envoy from the Nether Realm.The little dumpling, carrying a lantern, walks among the mountains and rivers of the earth, guiding the souls with a proud stomp, declaring: Lord of the Netherworld is not much older than me, who are you calling childish!The noble and refined Lord of the Nether Realm lands and transforms into a twelve-year-old boy, gentle as jade: whatever the little envoy says is right.Yun Xiaoqi keeps waving his hands: nope, I'm just working here.