Shinwa Densetsu no Eiyuu no Isekaitan - Volume 10, Chapter 1 – Wriggling Darkness, Part 4

A series of short stories in the world of Toaru Majutsu no Index organized into chapters featuring Kanzaki Kaori as the protagonist, going around the world and space doing missions for the Church of Necessary Evil, however, there is more than meets the eye as each incident is connected.

One chapter was bundled with each limited edition release of the Toaru Kagaku no Railgun anime DVD and BDs, with all of them together being equivalent to a single normal Toaru Majutsu no Index volume

It’s a trend to take your grandfather along with you when passing through to another world, but we have kind of been cheated—have you ever experienced buy one get eight free?

Hong Xiaobao: “This opponent is a bit formidable. All you old-timers, hurry up and save me please! If you don’t appear, then this prince is going to get angry!”

Demon Emperor Meng Xianji: “Mockers, kill! Those who defy me, kill! Strong people, eat! Valuable treasures and materials, eat! Good equipment, steal!”

Wine God Xiao Sanshao: “Why must you be so brutal? If there’s something wrong, can we not just all sit down and have a nice chat? I’ll teach you how to taste wine, youngster!”

Medicine Immortal Tian Can: “You guys chat first. My condition today isn’t very good, so I’ll go rest first…. If you want to concoct some medicine, tell me after I wake up….”

Godly Craftsman Xi Hong: “Didn’t I just upgrade your equipment yesterday? What are you afraid of? Attack, youngster! Isn’t that right, Chen Nan?”

Formation Spirit Chen Nan: “En…. How about you go ask Mao Yue.”

Beast Emperor Mao Yue: “Today’s sunshine is too bright. I’m recalling that cat of mine who died because of menstrual pain….”

Hong Xiaobao: “Can you guys not be so misleading?”

- Description from Novelupdates

Man summoned to another dimension- Check!Reincarnated as an elf- Check!A dwarf with a plan to go to the Mo- Wait, wut!?Simon Steelrun dreams of going to the Moon, to fulfill his mother's last wishes. Though he has the will and drive, he does not have the...necessary capabilities to go there. Though he tries his best to get there, he all but fails. Just as he was about to give up, a stranger came from a faraway land.A land called Earth...Joining him on this journey is a reincarnated elf, a warrior orc with a mysterious past, and a host of myriad other beings, as they tackle various challenges to create a rocket ship to take them to the Moon.Yet their journey is all but smooth...Hampered by a technologically backward world, a human-centric empire, monstrosities of inhuman proportions, and Goddesses with unknown agendas, they must navigate through these difficulties to reach their destination. Further wrenches are thrown in when the planet's dark history starts catching up to them, forcing them to take action on behalf of others.Secrets that should have been hidden...Join us in the adventures of a dwarf with a dream, as he navigates his way through his journey to reach his destination, all the while being dragged into adventures which changes the course of the world.“All I want to do is go to the Moooonnnnn!”

A Heavenly God was transmigrated into a different world right after he died. After arriving in that world, he resides in the body of a handsome young man with a mechanical voice inside his head providing him with missions. It also kept on telling him to brew wine every single day.