START-567 I couldn’t help but notice my male friend’s younger sister’s carefree, bra-free look. When I pointed it out while we were alone, she became extremely shy and easy to persuade, and things quickly escalated. Ogasawara Nano

Shiro stays overnight at his best friend’s house and, unaware of his younger sister Nano’s secret feelings for him, ends up staring at her casually unguarded appearance. In the changing room, he accidentally picks up her bra and is shocked by its large size. As he lies beside his brother, Nano trembles with embarrassment when her lack of a bra is pointed out, and he impulsively pulls her into a tight embrace. A pure love story overflowing with the passion of a first crush, centered on a beautiful busty girl.