Volume 1: 
1. Uwaki to Honki (浮気と本気, Faithful and Unfaithful) 
2. Furachi (フラチ, Outrageous) 
Volume 2: 
3-5. Souiu Concept (そういうコンセプト)

Kengo Kai is a guy who loves to use his binoculars to spy on a woman's apartment at night, when she masturbates uncontrollably. One day, when he was on his way to his part-time job, he noticed that a woman seemed to be having trouble in the bike parking. What puzzled him was that this woman is the one he always spies on at night. Thanks to the fact that he helped her, it would be how it would start the adventure of the two of them. 
 
Note: A live-action AV adaptation (MIMK-117) was released on April 4th, 2023.

Sasahara's world comes crashing down when he happens to see his girlfriend Riko kissing another man in public. Sasahara's friend, Mika, tries to console him during a night of drinking. They later realize that the man Riko was being unfaithful with was Mika's own boyfriend. After that, Mika learns that poor Sasahara is still a virgin. In the heat of the moment, she decides to break up with her boyfriend and try to make both feel good again, by taking Sasahara's virginity. A short tale of broken relationships, cheating, and the search for true love. 
 
(Source: J-List)

Having lost his passion for work, "Kouhei" is considering his resignation.
 
He hits it off with "Rion", who works as a member of the character cast in the concept cafe his coworker invited him to. From that point onward, he'll start showing up regularly as a customer there. However, on the way to the cafe, he begins to realize that Rion is getting harassed by the other cast members of the concept cafe...
 
One evening, the two of them unexpectedly meet at a park. Listening to her story, he learns that she was freeloading at her friend's place and she had just gotten kicked out. Coming from a place between kindness and secret intentions, Kouhei invites her to stay at his place. Rion readily accepts his offer, and from there begins their puzzling lifestyle living together...
 
(Source: FANZA, translated)

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