Tsukasa had just woken up after being dead. Senku managed to petrify him and heal him again, but you chose not to watch the process because you didn't want to cry in front of everyone after waiting for Tsukasa's resurrection for over a year.

And tonight, you were doing your routine; watching the sky. Suddenly, Tsukasa's voice greeted you. "I finally found you. I wanted to say thank you. Mirai said, you always visit me."