Ultimate Lover Swamp. Ideal Sex-Only Relationship That Is Not Disturbed By Work Or Family With Yua Mikami

最高の愛人沼 仕事にも家庭にも干渉してこない、セックスだけの理想関係を三上悠亜と…。

Also known as SSIS-338

SSIS-338: The protagonist is a salaryman, who meets Yua at the office. She becomes his mistress and proves to be the perfect lover, very giving, and not demanding.