They had plans for when the concert was rescheduled, which is why the other half of the harem was training to take their place.So if the girls were on a video call, couldn’t they just be… at the event too?
I'd like to believe that both Meme and uncle Hiro helped to make those.Rentarou, the embodiment of sleep is for the weak. He's always up doing stuff like this for his girls
Glad all the girls were here!! ...but seriously how long did this take