Between drinking with Riho and enjoying the summer festival with Rei, Hayato's making the most of the summer. But something's up with mood maker Ami! While they're figuring out what sparked the sudden change, Ami's foster sister Eri visits the area to propose to her long-distance boyfriend...! Dreams, choices, and a premonition of parting... By exchanging punches, the girls' wavering hearts will shine even brighter!!