MIDV-708 Living together for five days with a conceited childhood friend and junior, Tsugihikari Fuyu

I have a younger childhood friend. Our parents are also close, and when they go on a five-day trip, I end up taking care of my childhood friend Hikari. She's scared of thunder and comes into my bed, or she says she's afraid and embarrassed to bathe alone, so she bathes with me wearing her swimwear. She always looks down on me and is insolent, but I can't hate Hikari who always plays with me! Does she do lewd things while acting tsuntsun because it's the opposite of affection? A tsundere cohabitation life sent from a first-person perspective!