In the Edo period, at the remote village of Okitsu, the evil cult leader Koushirou uses ninjutsu to bewitch sharks and forces them to attack local pearl divers so the cult can steal the pearls from their mangled corpses. Desperate for help, the village chief hires Kotaro Shiozaki, a guard at a nearby temple, but Kotaro soon finds his path blocked by lady ninja Kikuma and a gigantic shark that doesn't seem like something from this world.
In Tokyo, lonely patrons pay to sleep ("soine") with someone. Massage, cuddle, sleep… for comfort and nothing more than the warm embrace of another. Tasuku, a young man fresh out of a relationship, starts a new job as one of the cuddlers. He's nervous and reticent, but soon finds himself with a procession of clients, male as well as female. In his unique position as their companion, he finds himself privy to the true selves they keep closeted. Tender performance and contemplative writing elevate an exploration of the human need for comfort and tenderness, while learning to be true to oneself.