Hero - Season 1 Episode 3 Marry Me?

Amamiya and Egami drink at a bar while talking about relationships. They encounter a couple fighting over something. Drunk Amamiya confronts the couple and Kuryu who is nearby walks over to stop her from interfering with the man who is holding a knife. The man ends up wounding the woman on her wrist. The woman then sues the man for criminal injury. Meantime, the story unfolds as Kuryu and Amamiya discover that the woman is actually involved in a marriage fraud.