Soushitsu no Married Life

Youko, whom the protagonist married after a surprise pregnancy, has had little sexual experience since losing her virginity. Lately, she’s been struggling with anorgasmia.
With their child now in kindergarten and the demands of parenting easing up, Youko suggests,
“Should we try for a second child?”
This sparks a renewed intimacy between the couple, setting the stage for this story…

[Translated from dlsite]