I hate to say it since it's cute but it's very flat and uninteresting. There's 'romance' but most of the actual loving relationship is shoved into physical existence immediately in the last chapter, the rest of it is just buildup. I'm a fan of a slowburn but that's like leaving the majority of the LOTR plot for the last hour of the final movie. There are better reads with the same/similar tags, but it's fine for a quick skim and smile if that's what you need.
Kimi ni Barenakya Honto ha Motto