I Found Out My Wife’s Sister Wants Me, So We Fucked Like Crazy Behind Her Back; Starring Mako Iga

Original title: 妻が不在の間、僕は妻の妹に告白されてハメまくってしまった

"I liked him from the first time I met him, but I got married to my sister... but I still have regrets." A house with no wife, just the two of them. Nothing is in the way. "If my wife doesn't come back like this..." She wants to drown in this relationship so much that she makes such a dangerous delusion.