I have a question who do you think within the I7 cast will be involved heavily in the boop war? (For experiment sake there is a snow storm outside and they are locked safely in the apartment and thus have lots of free time to do this.)
I have said this before and i will say it again Izumi Iori is a Very passionate booper. not only does he super boop people, he also high fives the cats and launders his boop count. and because I headcanon him as autistic (just like me for Real) he has to give exactly 7,777 boops otherwise idolish7 will fall apart and disband and it would all be his fau-
he starts the boop trend among i7 of course, and nagi becomes an extremely dedicated participant as well. Yamato finds it a bit stupid so nagi gets mad at him and keeps EVIL BOOPING him and with every evil boop yamato gets a shin kick irl.