Record of Chrono's War: Apparently I'm Only the Strongest in Bed

After ending up in another world, one young man has become the lord and general of an entire army of demihumans! But his mission suddenly gets way more hands-on when a beautiful half-elf girl appears in his room one night. A sexy isekai about leading in the streets and training hard in the sheets.

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クロの戦記異世界転移した僕が最強なのはベッドの上だけのようです