 If you liked
Tate no Yuusha no Nariagari
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 ...then you might like
Isekai Ojisan
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I hate how Isekais always have exaggerated Ecchi. But still, it has a cool, intriguing, and slightly generic story. Personally, I love Isekai because of the mystical energy that comes with discovering a completely new world with unique mechanics. If you can put up with the Ecchi, it's worth a try