[Masuda] Ani x Imouto Dokidoki Mousou Ona

Ruria, a doted-upon heiress with braided hair and a wealthy estate, lives alone with her bespectacled older brother while their parents are abroad. She fusses over his dry lips with lip balm and declares it her duty to keep him healthy—but behind closed doors she's aching with a secret she can barely confess even to her panda plushie: she's hopelessly in love with the one man she can't have. When her longing finally spills over, one stolen night turns into something neither sibling can take back, as he spreads her trembling thighs and buries his face between them, drawing out cries she never knew she could make. A tender yet scorching tale of forbidden sibling devotion where 'taking care of brother' takes on a whole new meaning.