Imouto no Otto ~Saikai no yoru, Watashitachi wa...~

She has no boyfriend, and is invited to the hotel if she is alone with the chief at a drinking party, and as soon as she thinks she's not very shy, she receives a phone call from her sister's husband, Kazuomi. His sister, Mihisa, disappeared with a man. He rushes to the family of Washin, but does not seem to care. The incense of staring at Kazuomi, who was a little impatient, had mixed feelings. Kame, who thought something was wrong and would never be related to Kazuomi again, dreamed that Kazuomi would become his family as his younger brother-in-law. Because noko and Kazuomi were former college classmates, only once that night when it snowed...