Mizuka desperately searches for the old man who somehow knew her personal information. After seeing her off, the old man, claiming to be Mizuka's friend, was led by her unsuspecting sister Mone and entered their home. Sobbing with emotion at her enormous breasts, he attacked Mone, and she, knowing nothing, falls into her first pleasure! The old man made a promise to meet again with Mone, who had completely melted away...!