VR] My friend's sister, who is famous for her big breasts and eroticism, secretly beckoned me, who had been dumped by my girlfriend and made fun of by my friends, and wrapped me in her motherly love and tits and used me as a training ground until I graduated from being a virgin... VR - Aika Yumeno

The legendary virgin graduation episode! A love story with a friend's older sister.
After being rejected by his friend's older sister, the protagonist is downcast, unable to lose his virginity. It is then that he is encouraged by the highly acclaimed busty beauty, Yumeno Aika. Her surprising proposal is to 'practice for graduating from virginity.' Captivated by her charm, he decides to take on the training with her. This story is a drama of his growth into a full-fledged man, at the end of their intense love. A masterpiece for everyone supporting virgins.