Looking for a hentai manga

Hi there, I have been looking for a manga which is

- related to mind control
- related to schoolgirls
- have harem
- the story plot is about the main character (brother/male) finds the teacher of the school is manipulating the schoolgirls and the main character has to find his sister. And he finds that his sister is manipulated as well. So, he has to fuck his own sister to save her.
- there is a scene where the teacher sits on a pile of naked girls
- there are some manipulated girls trying to stop the main character from reaching the teacher by sitting onto his face, but somehow the main character escaped by licking the pussy.
- I remember the main character addresses that he was embarrassed by his own small penis
- I think the characters have blue hair? or not?

If you can find it, then you are incredible. Please tell me what manga is it.
local expert on Mind Control here, you may want to check this artist to see If anything jogs your memory. look for the mindcontrol chapters. the top 5 artists on mind control rarely ever have more than one Male character. you descriptions sound like this artist would have made it. vv

artist name: Shiwasu no Okina

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