Dangerous! Website of Darkness 1 – Busty bullies get fucked hard for information

Dangerous! Revenge - Website of Darkness / Yabai! Fukushuu Yami Site / ヤバい! -復讐・闇サイト- / 위험해! -복수・암흑 Site-
A mysterious fire and a bullied girl committing suicide led her brother (Ryou Tezuka) to take matters into his own hands.
Taking three girls -- Yukawa Ayano, Inami Misuzu, and Tsubaki Rina -- he fucks and extracts information on why they had to bully his sister? Why did she have to die?
Misuzu Inami is a model that does well, Ayano Yukawa works as an actress in public entertainment, and Tsubaki Rina seemed to be his younger sister's best friend.
There is also the mystery of a journal hiding a dark past...