A Couple of Cuckoos, Volume 19 (A Couple of Cuckoos #160-168)

Nagi and Hiro have broken up! After a shocking Christmas, Nagi works to regain his happiness, and Hiro tells her true feelings to Erika. As the new year rolls around, Nagi finds himself busy with cleaning the Ama-Umi House, the Amano Group year-end party, and Ai-chan's new year's concert. Amidst all that, Sachi's high school entrance exams are closing in... and then she confesses her feelings on New Year's evening?!