Shall I help you masturbate? – Live-action version –

MIMK-159 The protagonist allows his brother and his family to live in his house for a while. Despite his kindness, he suffers every night as he overhears his brother having sex with his wife, leaving him feeling sexually frustrated. One day, Hikari, his niece, offers help to console him by masturbating him, and this marks the beginning of an incestuous relationship.