Shield Hero: Shielding the Truth (Patreon)

In this story, the spell brinigng the Cardinal Heroes to another world sends Naofumi to the land of L'Arc and Therese instead. As they get to know the Shield Hero better, they realize he's one of the ones that they're meant to kill. Too acquainted to do anything of the sort to him, they resort to putting him under a spell that makes Naofumi a much friendlier personality that they could be intimate with.

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Finally got around to watching Rising of the Shield Hero as a result of this request, and I liked the first season, for the most part. Second season is...well, it's much trickier thanks to being a larger arc and taking so many twists and turns inside it. The third season is just in its early stages, but I'm hopeful that it can get better from the second.

Anyway, enjoy the story!