dazai left chuuya for 13 years chuuya and dazai are immortal so they won't grow up dazai is 23 chuuya is 22. Chuuya is a famous singer but dazai doesn't know that dazai left chuuya for a girl 13 years ago but she left straight after and he never found anyone else missing his chuuya... (you choose character)