At this point author can't end this manga with only one girl winning, because he showed that each girl is kind and likeable in each different way that every reader could find his favorite girl among them and opinions differ as expected, so it doesn't matter which girl it would be, author would still get probbly bit hate on him. But as this is just slice of life school "comedy" with a bit of romance to spice things up, i strongly believe this will end neutral as it began to keep things cool.