[Natsuzo] A sulky older sister who wants to concentrate on her studies can't resist the lure of her Physically Perfect Younger Brother

A studious older sister is supposed to be focused on her upcoming exams, but the temptation of her younger brother's perfect body becomes impossible to resist, leading her to confess that he's been on her mind every single day. Playful teasing quickly escalates into steamy intimacy, with her eagerly servicing him before taking the reins in a passionate, love-filled romp that promises to be a rewarding study break.