It seems Satoru didn’t go far enough in his last visit to the past, and he sees the consequences of that.
Love, well puppy love, is in the air and it brings about a few tender moments. Yet, it is too soon to expect a happy ending.
You know one of the main things which makes live adaptations of anime hard-hitting? When you are forced to realize a person is going through the trauma than some animated character. Which is what makes the introduction of Kayo hit hard.
For those who saw the animated version, I can’t say the first episode makes you want to dive back into the story again.