Takeru feels frustrated living with his older brother and sister-in-law. He's constantly hearing them have sex and seeing his niece, Hikari, casually showing off her sexy figure in casual outfits. He wants some private time to relieve his stress, but his space is always occupied. When he's at his breaking point, Hikari whispers sweet words to him: <b><i>Want me to help you cum?</i></b>