TLDR

Satisfying Conclusion?❌ (Hope for another season!)
Emotional?❌
Actual Romance?✔️
Actual Comedy?✔️ (made me "heh heh" a couple times)
Fanservice/Nudity? ❌
Recommend? ✔️

What is this anime?
The MC starts working at a company and is trained/sits nearby this "Senpai" thats mentioned in the title. The MC looks like a child and the senpai looks like a gorilla. We watch their relationship grow and change, as well as the relationships of their co-workers around them.

Did I enjoy it?
It surprised me. Judging from the title, I thought it would be similar to shows like "Teasing Master Takagi-san" or "Don't Toy With Me, Miss Nagatoro". However, it is more laid-back. And while her senpai teases her at times, it is nowhere near the focal point of the plot. There is a running story where we see everyone's relationships evolve, and I hope to see more in the future.