Semai Sekai no Identity (Japanese: 狭い世界のアイデンティティー, Hepburn: Semai Sekai no Aidentitī, "Small World's Identity") is a Japanese manga series written and illustrated by Rensuke Oshikiri.

It was serialized in Kodansha's seinen manga magazine Monthly Morning Two from August 2016 to June 2020, with its chapters collected in five tankōbon volumes.

Semai Sekai no Identity, written and illustrated by Rensuke Oshikiri [ja], was serialized in Kodansha's seinen manga magazine Monthly Morning Two [ja] from August 22, 2016,[1][2] to June 22, 2020.

[3][4] Kodansha collected its chapters in five tankōbon volumes, released from April 21, 2017,[5] to September 18, 2020.

[6] The series ranked first in the June 2017 edition of Takarajimasha's Kono Manga ga Sugoi!