Atsushi Oka

"Wake Up, Girl Zoo!" is a small zoo located in the outskirts of Sendai. On the verge of closure, its director Tange and breeding staff Matsuda must set out to find a new animal unit for the zoo. How will they revive the zoo with the seven newly gathered animals? (myanimelist.net)

The story focuses on Hige a middle-aged employee who loves marshmallows and Wakabayashi a young woman who would like to get Hige's attention and ideally a relationship with him.