Synopsis

A quiet rivalry existed between Ako and Riko, each striving to be the most helpful. One afternoon, while alone in the room, Riko and Keita engaged in playful antics beneath the kotatsu, until Ako discovered them. Later, as they searched for good luck charms to aid Keita’s studies, Ako and Riko stumbled upon one crafted from pubic hairs. After some thought, the sisters plucked their own hairs to fashion the charm, presenting it to Keita with a gentle warning not to examine it closely. He took the