Hige-san and Marshmallow
Meet Hige, a middle-aged office worker, and his subordinate Wakabayashi, an office lady who has a thing for him... even though he only has eyes for marshmallows. Source: crunchyroll
Aired 08/01/2016EP 1 - Hige-san and Marshmallow

2016
Ojisan and Marshmallow
The story centers around Kusaka, an older man who loves marshmallows, and Wakabayashi, an OL (office lady) who loves Kusaka. The anime follows as their relationship unfolds at their office.
(Source: Anime News Network)