Dekapai♥Namaiki♥Imouto Maou♥ ~Dekachin♂Gachi Iki Toubatsuki~

You are a NEET who has failed the university entrance exam twice and is now living at home as a ronin student. Your father has already passed away, and you live with your mother and younger sister, Mao. They have spent their days together peacefully, if not amicably. However, Mao, who used to innocently follow you, has grown up to be a bitch who humiliates you whenever she sees you. And in the past few years, her breasts have also grown rapidly, irritating not only your mind but your cock as well. You dream one night that Mao, who looks like a demon with horns, a tail, and a bat, is giving you a titjob and forcing you to ejaculate without any way to stop it. Unaware of this, Mao visits your room and smirks at you, making fun of your attempts to impregnate a trash can with a large amount of tissues in it. One day, while your sister's attitude and big tits are getting on your nerves, your mother tells you about Mao, who has been nodding off at school for the past month or so and increasingly going out after school without telling her where she's going. She asks you to look out for her, but then decides to go away on a business trip. You decide to live a short life together with Mao while paying attention to your mother's wishes. You are grateful to your mother for her kindness and encouragement, but you also feel a sense of shame. But she turns the tables on him and says, “I don't want to be ordered by my brother, who's a fucking ronin!”, this hurt him deeply. Mao goes to sleep one night and only enough her body starts becoming transparent, She suddenly wakes up and immediately falls in love with her brother who is worried about her, but she soon regains her usual mood and begins to order him around. He is immediately put off by this and heads right to his room. When you leave your room, something is amiss. You find that Mao is nowhere to be found in the house. You remember that her body became transparent, you immediately run out of the house frantically