[DeepL Translation - needs review] Volume 1 Introduction: Hashirata has a first love he has never been able to forget. It was Ayumu, the husband of her deceased sister.
With a promise to his sister, he quits the university he has just entered and visits the house where Ayumu and his niece, Ruika, live.
He asks her to let him take care of her, but Ayumu, who is worried about her future, refuses the offer...
Then, Ritsuka, who was watching their exchange, suddenly pours tea on him, saying "Run...
