Kana's eccentricity never disappoints.
I asked this elsewhere before but since she brought up kids...what are the odds that Sou's body was physically switched with his counterpart and no just mentally/his soul?
Specifically, since males are the ones that contribute the Y chromosome to children, could Sou's genes be more likely to produce sons? For that matter, I'm not sure if it's cultural or biological, but what if his sons inherit his libido too?
Our guy could have actually been brought here to be an isekai hero (population edition).