SSNI-308 My tsundere little sister tempts me with accidental panty shots every day without any guard

I love my big brother so much that I pretend to be defenseless and show him my panties every day! Panties peeking out from my uniform or stained with sweat, 'What are you looking at?' I say, but I feign sleep to tempt him with a panty flash. My tsundere sister's teasing drives my big brother wild, and when he can't take it anymore, I resist his counterattack but ultimately accept it, gasping cutely despite myself! Please enjoy Kano Yura's first temptation work as if you were my big brother!