Oyasumi Sex

As their parents' absence becomes more pronounced, an older brother takes it upon himself to care for his younger sister. However, as time goes on, his protective instincts morph into something far more sinister - a series of lewd advances that he believes she's too asleep to notice. But the cunning sibling isn't truly out of it; she feigns slumber while her brother succumbs to his lustful urges, marking the beginning of a twisted relationship in which they become ever more entwined as time goes on. As their bond deepens, our heroine discovers that she's not immune to the adult pangs of love and desire - but it's a path fraught with challenges, including contraception and societal scrutiny. Will this siblings' bond be strengthened or shattered by their taboo romance? Only time will tell in this enthralling tale of familial lusts and reluctant adulthood.