Kokomi, distressed by the simple sex life with Kusuo (husband), dressed up with "naked apron" and welcomed Kusuo's back at the door. (Advice taken from Kuusuke about Kusuo's fetish)
Seeing how little reaction Kusuo gave, Kokomi murmurred
"if I were a male I would've gone right at such a cute girl".
And Kusuo make this came true with his psychic power and reverse both of their genders and had fun after.