HNU-008 - Must Not Get Hard: Amateur Couple at AV Set 4

Is this a parody of the 'No Laughing' series? Apparently, it's the fourth installment, but it was my first time watching. The concept of the girlfriend getting ravished whenever the boyfriend gets an erection is a good idea, but I was skeptical about some of the situations that triggered his arousal. Still, I gave it a high rating because the girlfriend in the final couple was exactly my type, and the scene where they mess with the high school girl in the interrogation room was erotic and exciting.