Grandpa is Summoned - Recommendations

Alt titles: An Oldman in Counterworld., Jii-sama ga Iku

Grandpa is Summoned

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Tsukimichi: Moonlit Fantasy 2

Isekai Yakkyoku

Isekai Yakkyoku

A young pharmacologist and researcher in Japan died from overworking and was reincarnated in a Medieval Parallel Europe. He was reincarnated as a 10-year-old apprentice to a famous Royal Court pharmacist, had attained inhuman skills of ability to see through disease, material creation, and material destruction. He will deliver the commoners a truly effective medicine that was developed using present-day pharmacology. 

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Knight's & Magic

Knight's & Magic

A genius programmer and hardcore robot otaku is reborn into a world of knights and magic, where huge robots called Silhouette Knights roar across the land! Now reborn as Ernesti Echevalier, he uses his vast knowledge of machines and programming talents to begin to make his ultimate robot.  But his actions have unexpected results...?! The dreams of a robot otaku will change the world!

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Ascendance of a Bookworm OVA

Ascendance of a Bookworm OVA

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Tensei Kenja no Isekai Life: Dai Ni no Shokugyou wo Ete, Sekai Saikyou ni Narimashita

Tensei Kenja no Isekai Life: Dai Ni no Shokugyou wo Ete, Sekai Saikyou ni Narimashita

Whether at the office or at home, corporate drone Yuji Sano works all the time. So when his home PC flashes a message about him being summoned to another world, Yuji restarts his machine...only to find that he's inadvertently accepted the summons! Now in a fantasy world far removed from paperwork and computers, Yuji has just one thing on his mind: waking up from what he thinks is a dream and getting back to the mountain of work he left behind! But this other world has other plans for Yuji, who quickly discovers his Monster Tamer character class allows him to befriend slimes! And thanks to their number, those slimes help him absorb so much magical knowledge that he gains a second character class in the blink of an eye! How will Yuji wield his power now that he's the greatest sage the realm has ever known?! And what about all that paperwork?!

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Wise Man’s Grandchild

Wise Man’s Grandchild

A young man dies in a car accident and is reborn in a magical new world. The old, yet wise Merlin finds the boy, names him Shin, raises him from infancy, and teaches him combat and powerful magic along the way. 15 years later, Shin is ready to travel the globe on his own, but Merlin forgot to teach him something major—common sense!

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Problem Children Are Coming From Another World, Aren't They? OVA

Problem Children Are Coming From Another World, Aren't They? OVA

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Tsukimichi: Moonlit Fantasy

Tsukimichi: Moonlit Fantasy

Makoto Misumi is an ordinary high school boy summoned to an alternate world as a brave warrior. Unfortunately, the goddess of the world said with disdain, "Your face is ugly," stripped him of his title, and banished him to the outermost fringes of the wilderness. While wandering the wilderness, Makoto encountered dragons, spiders, orcs, dwarves, and all sorts of other non-human species. Due to differences in the environment from his home world, Makoto now exhibits extraordinary powers in magic and combat. Thus, he survives on this world while dealing with various encounters. The curtain rises on the alternate-world social reform fantasy of a boy forsaken by gods and humans.

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High School Prodigies Have It Easy Even in Another World!

High School Prodigies Have It Easy Even in Another World!

Seven high school students are involved in an airplane crash. When they woke up, they found themselves in a parallel world where magic and beastmen exist. Of course, they panicked at their sudden unexpected predicament... or not? Instead, they create a power plant in a world that doesn't have electricity, they did a little extra work and managed to take economic control over a metropolis, they managed to repay their gratitude to some oppressed citizens by upending a corrupt government, and basically do whatever they feel like?!

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Ascendance of a Bookworm: Part III