Honestly, an amazing end to a brilliant story. This episode showed us that it wasn't just Mob, but Reigen accepting himself as well. What would Mob think if he really told Mob what he was? And him mustering up the courage to face the truth enabled Mob to do it in the end as well.
It's ironic that Reigen says that he isn't his Master, because he literally taught Mob his final and most important lesson - accepting himself. Oh, I also loved the sequence when 99 by Mob Choir played. The animation and seeing Reigen struggle to tell Mob his feelings and help him out literally brought tears to my eyes.
I badly wanted him to touch Mob on the shoulder, but seeing Dimple again come and help Reigen do that was built up beautifully to the complete and happy ending we got in the end.
Loved the anime, the characters, the songs and the entire journey. It's now 100% complete and it was beautiful.