GOS01-おしおきの教育時間～私、彼氏のために教育を受けます～

We finally started going out.
I had finally achieved happiness, but a simple slip-up leads to that man blackmailing me.
There's no going back...
The shameful punishment enacted on my body at school during "class time" starts to escalate.
I have no choice but to take the lessons to protect my boyfriend...

[From DLsite]