JUY-276 My wife's secrets: My wife doesn't know what I know... - Mako Oda

Her husband, Kazuhiro's older brother, Masayuki, failed at his job and lost everything, so he ended up living there for a while. - Mako, the wife, is confused but accepts her husband's proposal... - Masayuki, who has been divorced for a long time, cannot contain his excitement just because he has a woman under the same roof, even though he knows that she is his younger brother's wife. - Mako, who is troubled by an unfaithful relationship with her brother-in-law, spends her time worrying that Kazuhiro will notice, but Kazuhiro, knowingly or not, treats Mako as usual.