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

Hitomi, the neighbor's sister, has always been unfriendly and cold, and I'm a little disliked... But we were close friends with each other, and our parents ended up taking care of me for a week on our trip! Despite her blunt attitude, she is actively involved with her! I watched my AV without my permission, and burst into the bath in a school swimsuit...! And then I suddenly realized. Sister, actually, about me...? Experience a completely subjective life with a tsundere busty Hitomi older sister!