I always though about him having a crush on Sho.... But maybe indeed it was for Yuuichi
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it would be so crazy and i really like the idea, Haruki starting to feel something for shoichi and yuuichi making him to think about if him deserves to be in a relation ship with the person who his own crush (shoichi) is in love with. It would be a different approach since in the other routes we have a shoichi being so jealous and brokenhearted so in this route we would have a triangule more complex