A week of tsundere living together with the unfriendly busty lady next door

My neighbor's festival sister is always cold and cold, so I'm not good with her... However, our parents were close friends, and our parents ended up taking care of me for a week on our trip! Despite her blunt attitude, the older sister will be bothering me whenever she has the opportunity! He gets drunk and becomes a nymphomaniac, or he makes him sleep together...! And then I suddenly realized. Sister, actually, about me...? Experience a life of living together with Matsuri, a busty tsundere sister, who is completely subjective!