Hono has become a shut-in at home after failing her university entrance exam. - When he wasn't commuting back and forth between home and the convenience store, he spent his days indulging in masturbation, reading erotic comics and the internet, but he set his sights on his younger brother, saying, ``Before I die, I want to lick his dick at least once.'' - Yuta, the kind younger brother, replies, ``If it makes your sister feel better...'' he says, intending to do it just once. - However, the older sister became obsessed with the taste of dick and started crawling into the younger brother's bed almost every night, and Yuta stared back at his older sister with mixed feelings as she gleefully gulped down the sperm. - …. - However, one day, Hono's emotions are shaken when she witnesses Yuta calling his girlfriend to his home and having sex with her. - Even though he's my younger brother, he's not my lover, I just wanted to see his dick...I felt intense jealousy and excitement for the first time. - "I can't forgive you, Yuta's dick is mine!" Is this sexual desire or love? - Hono Wakamiya passionately plays the role of a secretive woman with a bra-con relationship who is obsessed with her younger brother's dick!