BOKU WO TSUTSUMU TSUKI NO HIKARI: BOKUTAMA JISEDAI-HEN

Since the conclusion of the original series, Rin and Arisu are leading happy lives. Their son, Ren, is a very normal boy. But one day, a man and a woman as beautiful as an angel appear in front of him and tell him about a power! What is this power Ren suddenly has? The much anticipated sequel to "Please Save My Earth"! — Description from AniList community (anilist.co).