ある日、新しく家族に仲間入りした巨乳で性欲モンスターの義理妹に僕・弟・父・おじいちゃん全員犯される。

One day, my sister-in-law, Hotaru-chan, is a big-breasted, libido-monster! ? I and all the other boys are very excited when a Megumi girl appears in a house full of men! ! Peeping, voyeurism, sexual harassment! Firefly, who saw through the erotic gaze,...