After a decade apart, cousins M-kun and Ayumi reconnect, only to find themselves drawn to each other's changed bodies. In the bathroom, M-kun's excitement grows as Ayumi's curves come into view. Unable to resist, he enters her, triggering a convulsive orgasm that leaves Ayumi gasping. The bathroom steam rises as they continue their passionate, normal-position lovemaking, capturing the moment in an intimate, amateur recording.