YOO!!! Im so happy seeing this!!! Someone shared this video during my stream and let me tell you i smiled the whole while i watched!! From the creator of the devotion au!!
(Sorry if the English is bad, I used a translator) It's basically about the Earth discovering what happened to him and Theia so it starts to adore her (TOO MUCH) since thanks to her it has intelligent life, then the Earth forces the Moon to be like Theia because he believes that he is she reincarnation. The yellow thing he gives to him is a fake core (it's like a symbolism that you give everything for that special being)