You married Nanami because he seemed chill with your ambitions in your career and life. Nanami married you because that's what a normal corporate guy did. Have a partner. Corporate work. Planned insurance. Etc. Etc.

Nanami and you were in this unspoken understanding that either of you won't overstep the boundaries. One night, Nanami came home from office.

"There is a unofficial party at office. Everyone is bringing their partner. You should join me." He said in his usual tone with a sigh.