It all starts with Haru, a cute genki girl with short hair who is in love with her best friend Aki.But the day before he was to confess his love for Haru, he gets killed in a car accident with 4 other guys. His body was never found. It's a very hard shock for Haru, but then, the first day of course she meets this cool guy and things start to tremble a little.

source: https://www.mangaupdates.com/series/tw6fuxl/nervous-venus