Maybe it's 1.5 because its like an epilogue season? And season two will be about another couple? Yohan's friend and the guy he texts (may be the geography teacher lol) or yohan's brother and the professor
I think he didn't confess, but he shows he feels something, that's why he says sitting next to Johan is his courage, and Johan hold his hand at the end <3
And OMG, Lee Junseo catches on fast lol