MIAA-295 Living together with a tsundere younger cousin who seems mature but is actually younger, only during the holiday season. Ichika Matsumoto

I have a younger cousin. She's grown up in the city, mature and insolent. During the long holiday, my parents are going on a trip alone, so she'll be staying at our boring countryside home. She talks tough to me but also does lewd things... Is this her way of showing affection? She's insolent but impossible to hate; I'm completely at the mercy of this little devil! If this is what cohabiting with her is like, it might not be so bad...