My (probably first choice) is SPYAIR - Singing.
It was - I believe the last concert I went to before Corona struck and am I a lucky person to still have been able to see Ike live!
Singing was one of the last songs and it was great. In general the Spyair concert was one of the happiest I went to in my life, but Singing just gave me all the Oxytocin.
Ichigo nearly dies! Rukias execution is getting closer! HAPPY PEOPLE IN DA HOUSE!? It's just one of the best EDs of all time, but it doesn't fit the tone of the show at all.