Spoilered for spoiling the ending of the manga.Hotaru wins near the end by way of marriage contract for employment for You-san. Coconuts' protests the arrangment because he believes her Hotaru doesnt love him, and she tells him he's wrong, kinda. Saya loses because she has childhood friend status. Timeskip happens and we see Coco and Hotaru as young adults debuting their own brand new snack specially made for their shop. Coco's mom is really cute too.
Hotaru never really actually says shes loves him, and doesn't really blush at all either, from what he told me and my understanding of it, Hotaru doesn't feel affection the way most people do, she's is attracted to what people can do and say. Not in a "fuck me" kinda way, more of a "I like you, you're cool, lets hang out sometime". Personally, this makes me like her a lot less because she really does have a form of high-functioning autism, but shes still better than the other two girls.
Also, there's a side story, more of an alternate universe kinda setting where Hotaru doesn't show up. Its only about three chapters worth of content, but in it, Coco fails to get ranked in a manga competition, and Saya consoles him, he makes a comment on how good of a friend she's been to him, and in a moment of panic she grabs his hand and puts it on her chest and says that she likes him, Coco blushes, then the side story ends.
From the talk we had the other day, i'm hoping the director pulls an original ending, the current planned one for the manga is somewhat unsatisfying.