Shonari Shonari is a rockian, an alien literally composed of strong rocks. His parents died five years ago when he was 10 years old and ever since he was looked after by his older brother Dainari, who accepted a job in a yakuza clan as their enforcer and cleaner. Facing intense stress from the work, Dainari becomes an extreme alcoholic and receives brain damage from all the drinking. After the clan's boss is assassinated by a rival yakuza group, Haruko takes over mostly as result of being his mistress...