What kind of shit is this... disgusting coward, going for the safe option he already knows that she likes him, instead of the girl he's clearly most interested in. Such a crappy development outside of a Seo manga.
Don't get me wrong, I like Kanou and she certainly is very pretty. But the MC just goes for her because she's an easy target, he thinks this is his only shot at a relationship and finally because he's still guilt-tripping from that elementary school episode.
How to make your readers dislike your MC...