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 began 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 1mm of 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.