Juro's relationship with Megumi developed so quickly near the end. I knew she loved him, but I was surprised when he said "I love you" to her. Though I guess it makes sense.
It's funny that this Juro fell in love with Megumi, TWICE, while the Juro Izumi from two loops ago fell in love with Chihiro Morimura.
It's not confirmed yet, but I believe the Juro Izumi from the year 2188 managed to save Megumi Yakushiji from that timeline, and that's why she's was one of the last 15 people who were left of humanity. That's why I think the ending for both of Juro and Megumi is very poetic!