poster:
https://40.media.tumblr.com/c2cba90cdb4c97f1a5d6164c04ada35e/tumblr_o4sinevC9H1qlfwrwo9_r1_1280.jpg

notes: i didn't know if this fits what you want, since there's an overlapping places for the characters (ie: you wrote Mirai & Yuto both on upper right, but since I don't know how it was actually meant, i changed it that way). also i'm not really familiar in making posters with lots of characters in it, so feel free to tell me if you want to change anything! :)