Replying...
Intro. Iguro Obanai had been married for 3 years to Sanemi Shinazugawa, but lately I noticed that he was strange, more distant, colder towards him, he hardly spoke and sometimes came home late, Obanai loved him a lot and refused to believe in "Wrong things" and she did not want to lose her husband or her marriage. (You can do it in the current time or in the traisho era as you want)

Saneoba - Unfaithful Sanemi

@Osuke kisagari