
Blindfolded for a session, she thinks it's her boyfriend, but it's actually a total loser taking his place. She realizes the switch and rips off the blindfold, but the loser doesn't stop his relentless thrusting. Ignoring her protests, he forces her into a doggy style position, kisses her aggressively, and hammers away until she's forced to climax repeatedly, ending in a non-consensual internal finish.

The fact that you get to see Aisu-san in her prime completely naked is a big plus. However, it was a 'reluctant' theme, so it lacked a bit of excitement.
*Did you pay 99 yen for the part where Sueyoshi appears in a big way at the end? The content is so thin that it makes you think. The work was rough in many places, such as putting a mosaic on the actor's face but not on the lifeguard on the desk. The actor sitting on the bed probably had something bad happen to him the day before, but it doesn't look like he's just trying to disrupt the story.
There's no foreplay or anything, so I think it's perfect for when you're short on time and want something cheap.