Story 1: The kouhai's existence was forgotten, and there was no conclusion, plus he suddenly ejaculated while unconscious (right after peeing too) which is bizarre. Story 2: This loser can't even think to say "she told me I had to strip" as a verbal defense? She bulled him the entire time to make him get naked, but just because he got an erection suddenly he's unilaterally in the wrong and he'll never get a job again? Well, okay. Story 3: Why was there a bathroom with a massive window which he somehow didn't notice... and why did he spend, like, 20 pages straight peeing while the artist drew 2 entire conversations?
Great art, but the plots are kind of... odd. Of course, ero doujin scenarios will always have unrealistic elements, but usually they're just an exaggeration of how people would behave, or have excessive coincidences, not story elements that fly directly in the face of common sense.