Avsnitt 5

Hikari's mother begins to tell the truth that she had hidden to Futaba-chan, who came to hear about Sako. Previously, when Hikari's parents, Futaba's mother, and Liang Cho's father worked for the same pharmaceutical company, Hikari's father invented a drug that causes brain damage when taken in large amounts. It was being abused . Hikari's parents and Futaba's parents, who knew it, tried to stop selling the drug, but Liang Cho's father tried to hide what they said in order to protect himself.