Masayoshi Negishi
main character
OVA
4.4
My TrackerPLANNING
Episode: 0 / 2
My Score:
Anime DetailsFINISHED
- Format
- OVA
- Episodes
- 2
- Episode length
- 30 min
- Total watch time
- 1 hours
- Status
- Finished
- Aired
- January 10, 2003 – April 11, 2003
- Season
- Winter 2003
- Source
- Visual novel
- Original creator
- Blue Gale
- Age rating
- R18 — Hentai
- Country
- Japan
- AniList score
- 44/100
Estimated watch time
1h
⚡ 1 days at 5 eps/day
Tags & Tropes
School79%Crime73%Group Sex70%Male Protagonist60%Primarily Teen Cast60%Ensemble Cast60%Fellatio40%Nakadashi40%Handjob40%Cunnilingus20%
overview details
Synopsis
A horrible murder has been committed on the grounds of Nankai Academy. Professor Yuko, one of the school's most popular teachers, died when she was pushed off of the roof of one of the school's buildings. Her death has left her students with feelings of confusion, pain, and above all else... anger. Four of her male students, Masayoshi, Daisuke, Mitsuru and Shinya, are determined to uncover the truth. They soon discover an important clue: Professor Yuko's planner had been marked on the very night she was killed... marked with the names of seven girls. With this evidence, the boys begin their investigations... and they'll use any method required in order to find the murderer. Through rape, manipulation and torture, they uncover important details, but piecing the puzzle together won't be easy. And the longer their search draws on, the more they feel themselves being overtaken by their own dark desires... Will they ever find out the truth behind Yuko's death? (Source: Anime News Network)
Should you watch Perverse Investigations?
Perverse Investigations has been poorly received, with an average AniList score of 44/100 — 7% of 285 ratings are 8/10 or higher.
Of the 560 AniList users who started it, 7.0% dropped it, so it is dropped at a typical rate; 455 have finished it.
At about 1 hours in total, it is a short commitment — a weekend binge.
Best for viewers who enjoy Fantasy, Hentai, Horror — especially school, crime, group sex, male protagonist.
Where to Watch Officially
A streaming link is not listed for this title yet.
Main cast & voice actors
Creators & key staff
- Original creator
- Blue Gale
If you like Perverse Investigations
Perverse Investigations FAQ
How many episodes does Perverse Investigations have?
Perverse Investigations has 2 episodes of about 30 minutes each, roughly 1 hours in total.
Is Perverse Investigations finished?
Yes. Perverse Investigations has finished airing — the final episode aired April 11, 2003.
Is there a season 2 of Perverse Investigations?
No sequel is listed for Perverse Investigations as of October 2026.
Is Perverse Investigations based on a visual novel?
Yes. Perverse Investigations adapts the visual novel by Blue Gale.