Nuôi dưỡng tình yêu sống trong gia đình
Hatano family is living a peaceful, happy life until a tragedy strikes. Death takes away the husband, leaving only the mother and son to rely on each other. The teenage son, though in high school, is naive and foolish, always thinking about “sex.” Despite witnessing the neighbor hitting on his mother and even attempting assault, he remains clueless, only eavesdropping on the chirping sparrows. Sexual desires dominate his mind, shaping his personality. After several incidents of sneakily watching his mother masturbate, he succumbs to his own cravings. Despite her being his biological mother, he disregards all morals and decides to forcefully satisfy his long-standing curiosity and desire. Truly, a disobedient son.