Amazon Japan Description

成績普通、容姿普通、すべてが普通の犬吠健はある日、謎の陰謀で女子高に転入、そこで少女たちに異性とは何かを教えることに。夢のハーレム...かと思いきや、なんと学園の生徒、全員「サキュバス」だった!! 性に貪欲すぎる彼女たちはエッチに犬吠と健やか（意味深）な交流を図ろうとする...!! 果たして、犬吠は平穏無事に、彼女たちを導くことができるのか!!

Google Translated into English:

Gradual Average, Appearance Ordinary, everything is normal Ordinary Inubaki goes to a girls' high school with a mysterious conspiracy, so to teach girls what he is opposite. Her dream harem ... what I thought, what a student in the school, "Succubus" was! The girls who are too greedy for sexuality try to make a deep exchange with Inubaki with Inubaki ... !! Can you guide them safely and peacefully !?