Grandpa is Summoned

While protecting his grandson from a burglar, Seitaro Asao, a tea plantation owner, gets stabbed to death. A slight mix-up by a goddess gets him, instead of his grandson, accidentally summoned to another world. Seitaro accepts to take his grandson's place and starts his new life in the new world as a man ten years younger. Things are quite eventful from the start, but the gods work in mysterious ways, and wisdom and protection from the goddess helps him overcome all obstacles. (Alpha Manga)

30 chapters

• Chapter 27 — The Old Man, the Boy, and the Father
• Chapter 26 — Grandpa, the Bear Cub, and the Treasure Chest
• Chapter 25 — Grandpa, the Boy, and the Bear
• Chapter 24 — Grandpa and the Great Labyrinth
• Chapter 23 — Grandpa and the Great Ogre
• Chapter 22 — Jii-sama and the Blender
• Chapter 21 — Oldman and the Outside World
• Chapter 20 — Grandpa and the Drops of the World
• Chapter 19 — Oldman and the Lord of the Lake
• Chapter 18 — Oldman and the Tea Party
• Chapter 17 — Old man and the Lizardmen
• Chapter 16 — Grandpa and the Animals
• Chapter 15 — Jii-sama and the Underground Giant
• Chapter 14 — Oldman and a Food Stall
• Chapter 13 — The Town by the Lake with the Old Man
• Chapter 12 — Old Man and the Goblins
• Chapter 11 — Old Man and his traveling companions
• Chapter 10 — Old man and the training field
• Chapter 9.1 — Special arc the absent grampa
• Chapter 9 — Old man the Godparent
• Chapter 8 — Old Man and the Child
• Chapter 7 — Old man and the lost child
• Chapter 6 — Old Man's business talk
• Chapter 5.2 — Wandering Old Man
• Chapter 5.1 — Wandering Old Man
• Chapter 4.1 — BONUS CHAPTER OLD MAN IS ABSENT
• Chapter 4 — Old man makes a visit
• Chapter 3 — Old man teaches
• Chapter 2 — Old man travelling
• Chapter 1 — The old man who has been summoned