Sue, Cheryl, and Lexi are best friends. They do special things on their birthdays every year because they were all born on the same day. It's their 18th birthday now, and they're starting to lose their virginity.
守寡几年后，玉美子带着年幼的儿子远嫁敏雄（直藤刚治饰演）。那是一个偏远的小村庄，坐落在群山和海边。从那时起，我过着简单而稳定的生活，日复一日。但在她的心中，始终埋藏着一个不可磨灭的问题，她不明白玉芙为什么会自杀。一系列意想不到的事件导致Yumiko离家出走。当她到达海滩时，她忍不住沉思起来。敏雄追在她后面，回答了Yumiko挥之不去的问题。
