Also

Also me: gets absolutely BROKEN when realizing that in future scenes shown in earlier chapters ( ex. One day / Christmas day) NONE OF THE GUYS ARE IN A COUPLE!!!!

haha they DO get together in the future tho, author has confirmed both as endgame. the author probably just doesn’t want to spoil it by showing it in ‘special’ future chaps, and wants to wait until the story is actually caught up in the future so we can see it happen in real time