The story:
There's a rumour in Kenta's high school that the creepy old janitor Isaku Itou raped Miyuki's sister, which left one of the buildings boarded up. Soon Kenta, his friends, and the girls get mysterious letters telling them to go to said boarded up building, which they then promptly do assuming it's a prank by Kenta. Slowly but surely girls and guys start disappearing and then sex tapes involving them make the rounds to the remaining girls and guys who stuck together.
It's essentially a kidnapping mystery where this fat ugly bastard kidnaps and then rapes one girl at a time.
One of the coolest things Isaku does is use Kenta's friends against him, basically tricking his best friend into being a rape accomplice, which ends up causing some pretty interesting conflicts between the remaining members of the cast.
The characters have fun moments, and all have at least a semblance of a personality, which is extremely rare for hentai and really makes this show shine. Some of the sex scenes dragged on for a little too long but in general the pacing was pretty good. The ending was a little dumb, it was good but I'm not sure if I'd be able to forgive my friend if he raped and ruined girl's lives because he was horny.
The art/animation:
Isaku is a Pink Pineapple production based on Elf's game of the same name from 1997. The animation was handled by "Triple X" which is a guise for Arms, known primarily for Elfen Lied. The show looks really good and the visual comedy in it works, all of that is helped by Hiroya Iijima's really cute character designs.
Sound:
The voice acting is all really good, but the music is rather generic. Most of it boils down to trying it's best to be suspenseful and it's extremely forgettable. Not bad but not really anything remarkable.
Overall:
I enjoyed the show despite the few flaws I outlined in this review and unless you really just dislike rape you'd probably enjoy the show too. It's got late 90's charm and it's an early Katsuma Kanazawa (R.I.P) work. Despite being a rather dark and demented tale Isaku manages to have fun moments and cool characters... which won't be the case in some of the other -saku series entry's (wink wink nudge nudge). Anyway, Isaku was fun, and I'll give it a solid 7/10. I'd say it's worth the watch!
