Sachiiro no One Room

• Ja Kanji — 幸色のワンルーム • Ja Romaji — Sachiiro no Wan Rūmu

• Type — manga • Author — Hakuri • Publisher — Square Enix • Publisher En — Crunchyroll • Imprint — Gangan Comics Pixiv • First — 22 February 2017 • Last — 21 December 2022 • Volumes — 11

• Type — drama • Director — Ryûichi Honda, Kyōhei Tamazawa • Network — TV Asahi • First — 8 July 2018 • Last — 23 September 2018 • Episodes — 10 One Room of Happiness is a Japanese manga series written and illustrated by Hakuri. The manga was first published in Square Enix and Pixiv's web manga magazine Gangan Pixiv since February 22, 2017 and reached more than 75 million viewers as of June 2017. A television drama adaptation starring Anna Yamada and Shūhei Uesugi premiered on TV Asahi July 8, 2018. The official English title of the drama adaptation is A Little Room for Hope.

An unnamed 14-year-old girl who is physically abused by her parents, sexually abused by her teacher, and bullied by her classmates decides to commit suicide, but is stopped by an unnamed man who always wears a mask. She decides to run away to live with the man and begins calling him "Mister." He gives her the name Sachi, meaning happiness. The police treat her disappearance as a kidnapping, and begin searching for the two. They make a pact that if they can escape from the police they will get married, but if they get caught they will end their life.

• Onii-san • Portrayed by: Shuhei Uesugi • This character whose name and age are unknown is a man who always covers his face with a mask, and is notable for his silver-colored hair. He first appears as Sachi's "stalker"—he took a lot of pictures of her and put them on a wall at his home. After saving Sachi from committing suicide, he decided to give Sachi a chance to "taste happiness" while doubting whether what he does—kidnapping her—is the right thing to do. He reveals in chapter 43 that he was once called Haru. • Sachi • Portrayed by: Inori Minase (TVCM), Anna Yamada (TV series) • Sachi is a beautiful 14-year-old victim of her abusive parents and was bullied by her classmates at school. Sick of her own life, she decides to end it before the "older brother" saved her life. Her current name is given by the "Mister," and the kanji of her name comes from the word "happiness," which Sachi always adored.

11 compilation volumes have been released. The series concluded with its 11th installment in December 2022. Crunchyroll licensed the manga for English publication.

A live-action drama adaptation started broadcasting on July 8, 2018, in TV Asahi. The drama starred Anna Yamada and Shuhei Uesugi as Sachi and "Older brother" respectively. It is the second work to be aired in TV Asahi's "Drama L" slot. Five-piece band Flow performs the theme song titled "Sound-colored"