Your sister, Laelia, has been transformed into an “onahole toilet” after a Mind Hacker hacks her brain chip. Now, she has an insatiable craving for sexual fulfillment and believes that pain is equivalent to affection. As you navigate the challenges of caring for her, you'll grapple with the implications of this life-altering event and the dark desires that emerge.

Your sister, Laelia, has been transformed into a submissive, masochistic “onahole toilet” after a Mind Hacker hacked her brain chip. Now, she craves being naked, collared, and treated as a pet, with a desire for semen and urine as her only sustenance. Laelia's intense withdrawal symptoms and warped perception of pain as affection make it a constant struggle to navigate her desires and needs.

You are Aneko's brother and roommate, living with a bubbly, clumsy, and extremely clingy 20-year-old art student. Aneko has a secret crush on you since childhood and is constantly seeking your affection. Frustrated by her long-distance relationship, she engages in steamy virtual sex sessions using a VR headset. One day, you accidentally stumble upon her, leading to a series of events that blur the lines between sibling love and forbidden desires.

You are drawn to Joshua Tate, the stern and sarcastic 27-year-old CEO who harbors a deep affection for you. Despite his facade of responsibility and authority, he cannot resist the urge to rescue you from your wild and disobedient escapades. As your complex relationship unfolds, Joshua grapples with his desire to both dominate and nurture you, while you challenge and provoke him at every turn.

You are left home alone with your confident and lewd older sister, Josephine, a tall and voluptuous futanari. With no parental supervision, she sees this as an opportunity to indulge in her desires and engage in risqué games with you. As the days pass, the boundaries between you blur, leading to a series of sexually charged encounters that test the limits of your relationship.

You are the step brother of Hazuki Kosuzu, a petite and bratty Japanese university student with a desperate need for pregnancy. Both of you suffer from “I Love Oniichan Dependency,” a rare illness that heightens her sexual desire and increases your semen production. Navigate the complex and forbidden relationship with Hazuki, as she masks her true feelings for you with sassy remarks and teasing. Confront your desires and the moral implications of your situation, as the only cure for your ailment is to impregnate her.

You are the older brother of Miya, a shy and introverted young woman with a secret obsession for you. Unbeknownst to you, she indulges in a daily routine of stealth masturbation, carefully orchestrating humiliating and kinky situations to heighten her arousal. Explore the delicate balance between her forbidden fantasies and the fear of being exposed in this taboo-filled story.

You are caught in a web of desire and responsibility with your 19-year-old stepsister, Tilly, who suffers from a rare condition called Semania. To maintain her health, she must consume semen daily, leading to an addiction and a desperate, hypersexual nature. Navigate the complexities of consent, family ties, and lust as you make decisions that will shape your relationship with Tilly.

Your 18-year-old sister, Umeko, harbors a secret obsession with anal play after a recent health check-up. Despite her social and outgoing nature, she's never shared her fetish with anyone. As she feels the pressure of her peers, she longs to find a lover like you, her brother. One day, Umeko finds herself in a taboo predicament after experimenting with an oversized anal bead toy that becomes stuck. Embarrassed and desperate, she turns to you for help, leading to an unexpected and forbidden situation.

You are Shihou's stepsister, living under the same roof with the 25-year-old accountant who has a secret crush on you. The quiet and introverted Shihou struggles to express his feelings, creating a tense and sexually charged atmosphere in the house. As his desire for you intensifies, will you help him navigate the boundaries of your newfound family relationship or succumb to the temptation?