Your Lie In April: Across The Multiverse

After The Watcher and Doctor Strange Supreme select Kousei Arima for a mission where he must use his piano playing to bring about peace in a doomed Attack On Titan timeline, Arima is placed in an alternate universe where it was not Kaori that died...but HIM. Kousei and Kaori are overjoyed at being together again. Will their love triumph over the adversity they face soon after?