HJMO-226 - I thought it was my boyfriend... but I woke up having sex with an AV actor

The title says it all, but the premise is a huge stretch. I bought it because of the 'NTR' tag, but it feels more like a variety show than actual NTR. The setup is that a couple visits a sensual massage parlor, and the masseur swaps places with the boyfriend... but there's zero explanation for how they ended up there, making it hard to get invested. You can't help but wonder, 'Shouldn't the boyfriend be waiting in another room?' There's a scene where the masseur just barges in while the boyfriend is massaging his girlfriend, and the couple's attempt to act natural is so surreal it made me laugh. Regardless of the plot, it's a film that relies entirely on the actress's cuteness. It didn't really need to be a 'concept' film.