[Reducing Mosaic]YST-309 Silently ravaged my sister who started playing Layers, Yokoami Nanami

It's embarrassing for Nanami to appear in public, but she recently started wearing a cosplay outfit that her beloved older brother likes and raises her spirits. The photoshoot begins with her brother's smartphone, but he is fully intent on taking lewd pictures of Nanami from the start, becoming aroused as he shoots. 'Something feels off,' Nanami thinks to herself, but she strikes poses as her brother instructs. The photoshoot gradually turns into a perverted affair; Nanami has her brother's penis forced into her mouth and is even raped in her inexperienced vagina, ultimately reduced to a flesh hole.