I don't wanna be confident and think this is gonna be a happy one.
Whoever the girl was on the first panel could be getting married to someone else. There is no guarantee that Eri would fall in love with Fuyu the way she wants her to. It could just show the complicated nature of Eri's attachment to Fuyu and how entirely different their feelings are. To Eri, it's something normal, even if it was with someone as special as Fuyu. They were both risking what they had (each other) with Fuyu on the edge.
Nevertheless, I'm embracing myself because I don't really wanna feel too relaxed with how things could turn out. 2 chapters still seem a little too short to put all these in a wrap if they're not going to end up with each other, considering the fact that they just confessed and started going out, just for the last two chapters to show that they won't end up together.