MIDE-605 Living together for five days with a snotty childhood friend and junior, Mia Nanase

I have a younger childhood friend. Our parents are also close, and while they're on a five-day trip, I'm in charge of taking care of my childhood friend Mia. She says she's scared to sleep alone, so she comes into my bed; she's afraid to close her eyes and is embarrassed during bath time, so she comes to take a shower with me wearing her swimwear. Although she's bratty but unhatable, Mia has me wrapped around her finger! Is doing lewd things while acting tsundere a sign of affection? A tsundere cohabitation life sent from a first-person perspective!