Based on the erotic game by Elf. 
 
In the girls dormitory of Shukusei Music Academy are the famous daughters of good families. In the middle of the night, the girl's screams echo in the silent academy. Kaori is tied up and at that moment she becomes baptized into disgrace. There is a man whose name is Kato Shusaku who looks down at her with a fiendish grin as she cries in misery...
 
(Source: Anime News Network)

[Wiki (jp)](https://ja.wikipedia.org/wiki/辻親八)

Just when you thought that no one could drive harder, move faster, and hang lower than Kisaku, here comes the continued adventures of the original Letch. Thanks to Shusaku's position at an all girls' school, his story is packed with more girls, more perversion, and twice the lesbianism that Kisaku could ever handle. 
(Source: AniDB)

Based on the erotic game by Elf. 
 
It's now back and is more extreme than ever. He pretends to be the resident manager Kato, and humiliates the girls in the dormitory. Shusaku is a lunatic. He couldn't finish his fiendish plan because Eri Takabe has insight into his plan. But, Shusaku's madness is not over. His deep revenge restarts the girl's nightmare. The sequence of the old man's masochism begins. The beautiful girls are puzzled and amazed. Again tonight... it's a man's showtime.
 
(Source: Anime News Network)

Itou Shusaku