A brother accidentally catches a glimpse of his sister's panties as she cuts her nails with one knee up. He says, 'Maybe I should cut my nails too,' and receives the nail clippers from his sister after she finishes. The brother goes to his room and starts masturbating while smelling the scent of the nail clippers his sister used. Around him are his sister's hair ties, socks, used toothbrushes, and other items. The brother, who loves his sister dearly, often uses her belongings as material for his masturbation. Suddenly, his sister barges into his room without knocking. He doesn't have time to hide his erect penis, and his sister sees it. She blurts out, 'Eek! Sorry!' but realizes he was using her personal items as material and becomes furious. She initially storms out of the room but calms down after a while. This time, she knocks and visits her brother's room. 'I think it would be awkward for us to live together starting tomorrow if we keep this up. Today only, I'll be your material, so please stop doing this in the future.'
