As a teacher, her daily life appears calm and modest, helping run her family's unassuming ramen shop called "Koraku." But her family background is far from ordinary. Though she usually comes across as serious and innocent, a dark secret lurks beneath the surface. Since childhood, her father has molested her, and over time, male relatives including her brother, cousins, and uncles have gathered at the house to sexually abuse her in countless ways. Throughout it all, her mother remained indifferent, ignoring the abuse and abandoning her to suffer in silence. Despite enduring this torment, she has managed to survive.