Runa and Ryuto's sweet-and-sour romance takes a dramatic turn in the next volume of Our Dating Story! While their friends' relationships are on the rocks, these two couldn't be closer - until Runa's twin sister, Maria, steps back into the picture. As tension builds and misunderstandings pile up, Runa's hidden insecurities and long-buried feelings about her family finally come to light. With the winter holidays just around the corner, will the season of cheer bring them even closer together... or send their relationship into a deep freeze?