Suzuki Chinatsu, a perfectionist driven by achievement, has carried her parents' expectations and other people's praise since childhood, striving to climb the social ladder.
But when an accident strikes, she looks back on the decades of her life flashing past and feels only an immense loneliness, one that threatens to swallow her whole...
Perhaps Heaven has sensed her regret.
Suzuki Chinatsu opens her eyes and finds herself back in high school.
This time, she wants to live differently.
She'll start by making 100 friends!
Ever since Wakatoshi Ushijima can remember, he has loved volleyball, and he has always been good at it, devoting himself to the sport.
His family often worries about his social life, but he has never felt troubled by it.
He believes there is nothing wrong with living a life devoted to what you love. No one needs to be good at everything.
Suzuki Chinatsu is his classmate in middle and high school. Though she's a girl, she's strangely like him, especially in her discipline and meticulousness.
But after they enter high school, Chinatsu seems to start changing.
He should be disappointed by this. So why can't he take his eyes off her?
Theme: Live life with all your heart.
