The Bad Girl (S01E06)

Tamahiko manages to find Ryo at her house, where he learns that she is the eldest of three younger siblings and that her stealing stems from her father's abusive drinking problem. The following day, Tamahiko goes back to Ryo's home to get back the bookmark she had taken from him. Ryo promises to return it, but only if Tamahiko assists her younger siblings with their school assignments.