A world where humans are also bought and sold. Sui is left behind and grabs the hand of a red-headed assassin. Sui is a trained sex toy whose growth has been stopped. The hitman is a brother with a philosophy of self-defence who judges the buyers, which he can never forgive. Sui, who has never been able to hide her disciplined begging, learns a gentle place and freedom. And then there's the killer---. The two unwind in the nest of love. Sweet Days in One Room from the encounter. ヒトも売り買いされる世界。残された翠は赤毛の殺し屋さんが差しのべた手をつかむ。翠は成長を止められた調教済みの性玩具。殺し屋さんは絶対に許せない買い主たちを裁く正当防衛を理念とするお兄さん。温かい飲み物、並んでくつろぐこと、一緒のお風呂、ふわっと添い寝…躾けられたおねだりを隠せなかった翠は、やさしい場所と自由を覚えていく。そして殺し屋さんも―――。愛の巣でほぐされていくふたり。出会いからのスウィートデイズinワンルーム。