One day, I got engaged to my childhood friend Ami, but she was so virginal that I thought she would dump me... "Then... why don't you try practicing with me...?" Ami, who loved her like a little sister, made an unexpected suggestion! - The practice of sex started with trepidation... As expected, it would be morally wrong to insert it... So, I could slip into Ami's pussy through her pants... But for some reason, it started to overflow from Ami's pants... And inside her pussy through the cloth. - A dick has been inserted into it... If you've read this far, you've probably already figured it out. - This is sex. - Sex that took place through the 1mm cloth called pants. - Excitement along with a sense of immorality. - The two overcome reason and 1mm of cloth and finally unite firmly. - Unstoppable secret sex training.