Dekiai Osananajimi wa Watashi no Otto de Stalker!?

Aoi married her childhood friend, Ren, who she's loved since she was younger. However, Ren has never once touched Aoi. She has tried to seduce him in the past to no avail. One day, she goes into his locked room, and what she finds changes the course of their relationship forever...

(Source: Bunkasha, translated)