18 years old. Serina, an honor student at the academy who boasts a score of 70, has a secret that she can't tell anyone. It's about doing mischievous things with a middle-aged uncle between school and cram school. Serena-chan relieves her study stress while sweating and having SEX with her uncle. It's too erotic. It's a desperate patch where you'll be pounded over and over again and the English words you've learned will evaporate. Is this girl happy to have vaginal cum shot even though she lost everything during pregnancy? Or is it a sexual genius...