JUFD-616 - Seducing my boyfriend's brother while keeping quiet

In 'no-noise' scenarios, it's usually the man attacking the woman and the woman desperately trying to stifle her moans, but having the man in that situation is something I haven't really seen before... It just lacks excitement. I thought AIKA playing a nympho would be a perfect fit, but there's no sense of openness at all, so the appeal is halved. This concept is a total failure!