The Anime Lad
A hero was once summoned to another world and saved it. A trap then forced him back to his original world, where he had to begin life again as a baby and grow into a gloomy student. Now he is summoned to that same fantasy world for a second time. The standard introduction has become a return appointment.
Super Eyepatch Fox
Save a fantasy world after being summoned there. Get forced back to the original world and restart life from infancy. Then receive another summons to the same place. The former hero returns with experience the premise usually denies its lead. His new journey begins where an old one already left history behind.
Gigguku
He already did the impossible part once. After saving another world as a summoned hero, he got forced home to start life over from infancy. Then the same world calls him back. The excitement comes from return rather than discovery, because every step belongs to a place where he has already been the hero of another story.
Father's Basement
Another trip to a fantasy world would be ordinary without the title’s second time. The lead saved that world after being summoned there, then a trap forced him home. Growing up again does not erase that experience. His return gives the premise prior history, even before the new adventure establishes what has changed.