1
New Sisters and Christmas Confessions
Takumi's life is turned upside down when his father brings home two sisters, the cold Saori and the gentle Yui, to live with them. While Takumi struggles to bridge the gap with the distant Saori, he is blindsided by a passionate Christmas Eve confession from his close companion, Mii-nee, who fears losing him to the newcomers. Following an intimate encounter with Mii-nee, Takumi finds himself torn between his deep bond with her and his growing attraction to Saori.
2
Winter Promises and Heartfelt Vows
Takumi navigates a complicated web of relationships as he balances his love for Saori with his bonds with Mii-nee and Yui. During the New Year celebrations, Takumi shares intimate moments with both Saori and Yui, the latter of whom asks him to ensure her sister's happiness despite her own illness. When Saori attempts to break up with Takumi out of guilt over Yui's condition, Takumi convinces her that their happiness is what Yui truly wants, ultimately strengthening their bond.