Sen always wondered. Will her life be like other people's? Why does she feel so empty, like she is not really alive… Then Sen meets Sana, a girl with personality. Originally, two people could not have a relationship with each other, but a series of social events made them get to know each other. Since meeting Sana, Sen's life has had many changes, although it has been difficult, she has received joy and vitality back. Luckily, she met Sana when they were young... Because both of them have changed when they grow up. And maybe they will never be happy together, but she loves Sana, she will never regret her decision.