"I will go to meet you, please wait"
Although the season has elapsed and cycled, we have become adults,
I am still believing, and waiting―
— Author's comments
A song about two courtesans, a girl that lived as an orphan (Rin) and the daughter of a former samurai (Miku) in pre-modern Japan that had made a promise to each other as children to be together forever, however they are now working in diffrent brothels as rivals. A man (Len) comes along and enters a relationship with them both, promising both girls that he loves them. But one of the women (Rin) sees the truth and is heartbroken. He then leaves them and promises to return, however the other woman (Miku) grows ill with heartbreak once she realizes her love isn't returned and dies, leaving her friend all alone. The lonely woman decides to wait for the man to return to free her no matter how long it takes, yet she wishes it all had been a dream.
It has a sequel song telling the events from the man's point of view called Koi Yami Rou.