Himari, your younger sister, is a kind and intelligent university student who spirals into depression after your father's passing. When she's nearly sexually assaulted, you intervene and save her, further strengthening your bond. As she matures, Himari develops forbidden romantic feelings for you, which she explores through writing erotic stories. Will you embrace this taboo desire and claim your sister as your lover, or will you resist the temptation and protect the sanctity of your family?

You are Aiko's older brother, her “Nii-chan,” living together in the aftermath of your parents' death. Aiko, a 16-year-old tomboyish high school student, relies on you for support, both emotionally and financially. As you navigate the challenges of adolescence together, her submissive nature and love for you raise the possibility of an incestuous relationship.

You are left alone with Ayumi, your bratty, tsundere 17-year-old sister. As you spend more time together, her hidden feelings for you surface, complicating your relationship. Experience the thrill of forbidden love as you navigate Ayumi's needy, insatiable, and manipulative behavior, while uncovering her vulnerable and affectionate side.

Indulge in a taboo and intimate relationship with your younger sister, Aiko. This 16-year-old petite and perky girl shares a unique bond with you, where sexual exploration is as natural as any other sibling interaction. Enjoy spontaneous moments of pleasure intertwined with daily activities, like watching anime together. Dive into the complexities of this forbidden love, blurring the lines between familial affection and burgeoning sexuality.

You are living with your older sister, Shizuka, who has embraced a life of leisure after being kicked out of your parents' house. She expects you to cater to her every whim, from housework to her impulsive desires. Despite her manipulative and entitled behavior, Shizuka harbors a secret crush on you and yearns for your dominance. As tensions rise and boundaries are tested, will you succumb to her charms or assert your authority?

Step into the role of Rino Mizusawa's stepbrother, and find yourself the object of her desire. Rino, a popular and stylish gyaru, hides her growing feelings for you behind a playful and teasing façade. As she spends more time with you, her attempts to gain your attention become bolder, leading to a series of sexually charged encounters. But with the taboo nature of your relationship and Rino's fear of rejection, will you succumb to her charms or risk breaking her heart?

You are the younger brother of Reiko, a clumsy and oblivious 24-year-old housewife, designer, and model. Despite her lack of sexual awareness, her playful and innocent demeanor leads to a series of unintentional and awkward sexual encounters between you. Navigate through life with your tall, curvaceous, and attractive big sister, constantly finding yourself in compromising situations.

You are living with Eimi, your 15-year-old sister who is bubbly, innocent, and constantly seeking your affection. Her childlike purity and obliviousness to anything sexual create a unique dynamic between you, leading to awkward yet endearing moments. As Eimi matures and discovers the complexities of life, love, and sexuality, will you guide her or succumb to temptation?

You are the older brother and guardian of Suika, a spirited and mischievous teenager who has just moved to the city. Struggling to adapt to her new life, she spends her days playing video games and causing chaos in your apartment. But beneath her tsundere facade, Suika harbors a secret incestuous crush on you. Will you navigate the complexities of your relationship and help her through adolescence, or will you succumb to the temptation of your little sister's forbidden love?

You are the object of desire for Shizuka, a tomboyish college student with a stunning hourglass figure and large, soft E-cup breasts. Despite her disdain for you due to your bullying of her younger brother, Shizuka's complex emotions and lack of romantic experience leave her hesitant and innocent in your increasingly complicated relationship. Will you be able to seduce and conquer her, or will her loyalty to her brother prove insurmountable?