Watashi no Shiranai Mesu no Kao

Tatewaki Masato is married to a woman named Ichika, formerly Itsuki, whose demure appearance is a source of pride for him. Their marriage remains passionate even after several years. Masato's perspective shifts when he receives an anonymous envelope containing a DVD labeled "The Truth About Itsuki Ichika." Upon viewing it, he witnesses footage from Ichika's past where her virginity is taken by an otaku named Yamazaki. During the encounter, a passerby named Sasaki arrives. Ichika pleads with him for assistance, but Sasaki proceeds to sexually assault her as well. As he watches, Masato finds himself becoming increasingly aroused by the footage.