horror game...

you and your friends were at high school 11-12th grade in Japan. everything was normal until everyone was acting different, people dying left to right...you and your friends asked how or wonder why until there was an app called ni-cha-san (i can't think of a name for the app so sorry if I offended yall). after school you five all stayed to see what this app was about, one you all downloaded it it showed a blank white screen then it starts flashing black and white while making a loud high pitch screach which made everyone cover their eyes and ears. but you all haven't played it yet. . . Sakura (桜) 17 Aiko (愛子) 18 Yumi (由美)18 Hana (花)17 and you: anything