Hai to Gensou no Grimgar: Furoagari no Kabe ni Kaketa Seishun - One More Centimeter
English title: Grimgar: Staking Our Youths on the Bath Wall - One More Centimeter
Japanese title: 灰と幻想のグリムガル 「風呂上りの壁にかけた青春―one more センチメートル」
Alternative titles: Grimgar of Fantasy and Ash Special, Grimgal of Ashes and Illusion Special, Grimgal of Ashes and Fantasies Special, Hai to Gensou no Grimgal Special, Grimgar of Fantasy and Ash Episode 2.5, Grimgal of Ashes and Illusion Episode 2.5
Type: Special
Source: Light novel
Episodes: 1
Status: Finished Airing
Aired: Mar 16, 2016
Duration: 11 min
Rating: PG-13 - Teens 13 or older
Studios: A-1 Pictures
Licensors: Funimation
Genres: Comedy

Special episode that will expand on the ending of episode 2 where the boys try to spy on the girls bathing.

Included in the 1st volume of the Blu-ray/DVD releases.