A Sister's All You Need. Vol. 7 (Light Novel) (novel)

A new relationship begins.
Itsuki Hashima and Nayuta Kani are now officially a couple, finding success in both love and work. This new era brings changes to not only them but Chihiro, Miyako, Haruto, and (for some reason) Itsuki's tax accountant, Ashley. Chihiro, meanwhile, has a new rival to deal with, while Haruto gets the full-court press from Ui Aioi, a beautiful rookie novelist who adores him. With Christmas bells ringing in the background, it's a new season for the whole ensemble-but as they say, the more things change, the more they stay the same...