Yobai Game

Gyakuru-soft's first game is a netorare ADV set in a hot spa.

Meet the protagonist, ordinary salaryman Igarashi.
Sales are down and he's slipping into depression and debt.
A creditor named Kuroda proposes a deal: chaperone his beloved wife
to a nice vacation lodge in the mountains. He does this.
While on the trip they meet another married couple.
When things heat up at the hot spa lodge, Igarashi can't run from his his feelings...

[From DLsite English]