Help. Looking for a specific Japan BL series: writer falls in love with a delivery boy

About two years ago I watched a short series on WeTV about a middle aged writer who has a crush on a 20yo-ish delivery boy. They end up dating. The boy's hobby is dancing.

I think it was a Japanese series, but I am now unsure.

Strangely, I cannot find it in my watched list. I usually am quite a nerd putting everything in what I have watched. But I have only about 10 Japanese series, and none matches. I also googled, but there is no hint of such a series. I have definitely watched it. I am not dreaming :D

And no. It is not The Pornographer, nor its prequel Mood Indigo.

I have searched here on MDL with some keywords such as author/writer/ delivery boy. I have searched for Japanese series. I cannot find it. That is why I am already unsure if it was a Japanese series. It was definitely not Thai.

I also cannot find it on WeTV anymore. It is not in my history there. But it exists, I swear.

Any clues about the title? I cannot remember so much, that is why I wanted to rewatch it. It drives me now crazy...Thank you!

That's it!

Strange how my memory sometimes works. I thought it is a series, but they are a side couple. No wonder, I could not find it. You saved me! I was looking for this for weeks. I hardly could not sleep, thinking why I could not find it. Need to rewatch Cherry Magic then.

Again, many thanks!