The Persona 5: Mementos Mission manga will be concluding its serialization on June 27th, with the third and volume releasing on July 27th.
Said manga began its serialization on October 27, 2018. Sega hasn’t released a clear sales figure for Persona 5 Royal as of yet.
Unlike the still ongoing Persona 5 manga (a straight retelling of events in the original game starring protagonist Akira Kurusu), Persona 5: Mementos Mission features protagonist Ren Amamiya tackling original side stories along with his allies.
Plus, it was in the top ten for both the UK and US charts during its opening weeks.