Syaoran tells Fay it's possible that his entire miserable backstory could have been caused by Syaoran's wish to turn back time. Fay's reaction? Instant forgiveness. He just claps the boys cheeks, like the Team Mom he is.
Additionally, Syaoran basically told Kurogane the same thing. Kurogane's reaction? A light hit over the head. Yay for the Team Dad!
Fai punching Kurogane while calling him nicknames again during Nihon country, such a sweet moment after every hell that both Kuro-sama and Fai go through