[i]Ojisan to Marshmallow[/i] (OjiMashu for short) is an [[original]] webcomic series by [[Otoi Rekomaru]] that is posted to Pixiv. Posts of it often make the Pixiv Daily Ranking. 
A short-form anime produced by Creators in Pack aired during the Winter 2016 season.

The comic is collected in pool #8616.

h4. Characters

* [[Hige Habahiro]]
* [[Wakabayashi Iori]]
* [[Kachou_(ojimashu)|Kachou]]
* [[Wakabayashi Isamu]]
* [[MIO5]]
おじマシュ おじさんとマシュマロ