Episode 2.5 of the series, will expand on the ending of episode 2. Included in the 1st volume of the Blu-ray/DVD releases.
Synonyms: 灰と幻想のグリムガル 「風呂の壁にかけた青春――one more センチメートル」
Status: Finished Airing
Country: Japanese
Released: 2016
Season: Special