Its the story of Rio
I thought "Oohhh a probably boring but very cute slice of life" and I was not disappointed. I was looking for somthing to fill in the "Karakai no Jouzu Takagi-san" shaped hole in my heart and I had a good experience with "Servant X Service" and "Dad, Beard Gorilla, and I" so I said why not?
I did not expect that manga to end that quickly. Like it was in full on planning the wedding mode then BAM! It ends with them getting their wedding license and being romantic and saying thank you to each other. It also has a surprisingly high rating in MAL and MangaNelo.
I know that I was expecting too much from a slice of life manga, but damn! I thought— Overall it's wholesome, cute, and a bit too run of the mill for me. Kinda boring. Next!