Pretty cute and comfy manga, although I think it ended too soon. Feels like more could've been done with the characters and relationships.
Surprised no one here complained about the college/middle schooler relationship.
Nagi being small and Yuuka being the proactive one (most of the time) makes the age gap feel less of a problem. Them dating before Nagi graduated also helps. But I think the main reason there's no complaints is because this series just isn't popular enough to generate that sort of discourse.