Isekai-gaeri no Saikyou Tamer, Tsukaima wa Osananajimi

"But I'm powerless without you, my Master." High school students Wataru and Rumi were abruptly summoned to another world, where they ultimately s쳮ded in saving it from a devastating crisis. Having fulfilled their duty, the pair safely returned home, expecting to resume their ordinary lives. However, the Earth they left behind has undergone a drastic transformation during their absence. The modern world now closely mirrors the fantasy realm they just escaped. Mysterious dungeons have begun appearing across the landscape, and ordinary people are suddenly awakening to extraordinary skills. As reality itself shifts into something unrecognizable, Wataru and Rumi must navigate this new era using the immense power they acquired abroad. Operating as a tamer and his familiar, the two returnees form an unstoppable partnership capable of overwhelming any threat that stands in their path. Bound by a connection deeper than childhood friendship yet falling just short of romance, Wataru and Rumi rely entirely on one another to survive. Together, this unmatched duo cuts through every obstacle in their way, embarking on a thrilling dungeon fantasy adventure where the strongest combination of master and familiar will reshape the fate of their transformed world.