Tsuma, Riko. Hajimete no Happening Bar Taiken

The story of Riko's seduction by her not-husband Ikefuchi.
Ikebuchi was a cad at the bar. But his brazen conquests went further than imagined.
He enjoyed doing wives. At this bar such arrangements were easy.
Riko is and has always been a loving wife...
... with a loving husband, who brought her here, obsessed with a recent fantasy.

[From Dlsite English]